I've bought a number of the GWAS games with the intention of using them for AoS campaigns, but never have. I also had the AH game Blackbeard because the hex map of the 17th-18th C. Caribbean seemed useful, but I finally got rid of the game without using it. I decided the AP map for Plan Gold (and/or Plan Black) was enough and I didn't need both.
I have always thought the various annual Caribbean campaigns of the AWI would be some of the best naval campaigns, because they tended to be very even, the numbers of ships would be manageable (ca. 10-30 per side) and most had multiple strategic options. Even something like a relief attempt during the long siege of Gibraltar could be a pretty interesting short campaign.
The only way I've ever gamed AoS campaigns was as a series of linked games, 2-3 in a row. The best one had a court martial at the end, when the English rear admiral brought up the admiral on charges of dereliction of duty. Each acted as his own lawyer, the other players all formed the jury (and the other English admiral was called to testify as a witness), then the GM (me!) acted as judge. We had a good time with that.
I've considered running an Antilles campaign or North American Station campaign as a sort of one-track back-and-forth arrangement – each country has a main port at one end and a bunch of locations in a line between them to fight over, Reinforcements, troops, and occasional side missions would come into the home base and have to filter forward. Never put that together all the way though.
If anyone else has ever run an AoS campaign I'd love to hear about it.
- Ix