My thoughts since I and the gaming group play with the membership miniatures, not just our own personal collections, so post scenario clean up is always a concern for time.
1. Have well labelled miniature and hopefully a coding system understood by all the gamers. My collections.. FOW 20mm WWI, WWI, Naval miniatures, very large 25/28mm napoleonics, 15mm ACW etc, all have every miniature base labeled and color coded plus the coding is visible from looking at the miniature rear base facing/edge. Every single or multiple based/individual based miniature is labelled and coded. There are thousands and thousands of these based miniatures. Even if completely new players join in, afterwards they can sort out the units and place common unit miniatures as a group cluster pending placement into the storage boxes.
2. Have the storage boxes all labelled and marked out for miniature placement. 2nd DB Legere regiment (3x9 miniatures) goes into that slot or placement in the storage box. The storage area is sized for the unit of miniatures (3x9 based miniatures for 2nd DB Legere)… so if a miniature or two is missing or too many attempted to be placed… the gamer can realize simply by the size of the predetermined storage area. slot or labelled zone.
3. The storage boxes are labelled on the outside as to what they contain and I also use pictured unit or profiles of the contents. Thus the same storage box cover is placed with the correct storage box bottom containing the miniatures.
4. Using these methods… at a glance review of the final results is possible. Only if two units have mixed miniatures placement could there be an error… but at least all miniatures accounted for after clean up.
5. A group napoleonics game with eight players could have 20-40 units per player on the tabletop scenario end. Each unit has 4-10 miniatures in size, mostly individual basing. Quick math means we have easy 1500 miniature to handle or more. After miniature losses removed to side table, the miniature are found in two locations, tabletop and side table. So we have to bring the "losses" back to the main scenario tabletop, rejoining the units back to full strength, then place into the storage boxes, many times not even your own collection that you painted. Soon how we finish the job in about 30 minutes, including the terrain and table pack up process too.
5. Terrain, generally the hardest to manage in my option… but even these items have common storage boxes well labeled. Game equipment… dice, rules, tapes, charts etc, again well labelled storage locations or boxes.
6. A new process… I have taken to photographing the actual box contents when properly stored/placed in storage box and gluing a 8x10 photo blow up into the storage box interior top lid/cover. This only works if the box is complete and not likely the contents to change…. but several of the collection are now complete so a possible project into the near future. Big plus for this idea, any gamer can quickly realize "how" the miniatures look or positioned (facing the unit's miniatures) when properly placed into the storage box…. and duplicate same.
7. Start the process of clean up during play…. have a few minutes…. collect the used drinks cans, organize your miniature battlefield losses, basic tasks that don't interrupt the scenario play. Little thing add up and cut clean up time when the scenario ends.
8. New gamers to the group event…. well worth the time for you to assist them with any basic "clean up" task for a few moments. Let them become involved, basic instructions given, and let them understand the processes in place. After a game or two, they are veterans of the job at hand. There will be "screw ups…." but nothing that cannot be resolved. So what if the 101st Line has two 69th Line miniatures for now…. most likely means the 69th has the 101st joining them, or a third unit is involved. We always confirm the unit is "proper" when pulling out the units and before the scenario starts to catch those errors, and the second game corrects any mistakes on storage.
9. Missing miniatures…. Yep it has happened. All the miniatures have returned to their storage boxes/ placement and one unit is missing a miniature or two on final box contents glance. Eight gamers are searching high and low. Generally not a problem in our residence group games, since the hidden miniature turns up at a later date. For several months we looked for a Russian pioneer miniature till recently… becoming an inside joke at times. But, months later… he appeared with the US Navy….. somehow his travels found him with the miniature ships. For regional conventions, the final search under the table has always found something. I now look twice and under the nearby tables for good measure.
10. Then the joy of in house/residence gaming…. I have all the time in the world to pick up the tabletop. I personally feel that if I have the scenario game in my residence, the least I can offer the fellow gamers, apart from food and drink, is a prepared scenario game (miniatures, terrain and charts) before they arrive, just pending their miniatures if needed, and freedom to leave after the game with my offer to pick up the entire scenario. Simply done to offset their traveling time and distances involved. Just means more playing time for all.
But generally, all the gamers just help towards the clean up without a spoken word. Tradition and common custom for the group.
Napoleonic 25/28mm storage in cut down apple boxes:
Typical 25/28mm napoleonic game for one player frontage view:
A smaller 25/28mm napoleonic (really FRW) game at the Pyramids:
Same storage thoughts apply for all the periods and collections. WWII 20mm miniatures have their own labelled storage boxes and interior slotted space. 25/28mm Ancient collections their storage boxes placed and stored just like the shown napoleonic collections with strong box racks and visible box contents identification.
Lastly. Extra Crispy, I enjoy playing 28mm Clash of Empires (COE) ancients gaming too. Even with the large number of painted 28mm miniatures to return to their storage boxes.