Been there. Hard to get a glimpse of what the real enclave looked like, because so much is gone.
The best view was out to Happy Shahan's Alamo Village. Happy bought the old John Wayne film site, and created an entire western themed village that was used for a huge number of western films, commercials, music videos, etc.
I spent several months there helping to recreate the entire Alamo as it looked during the siege. The original was a huge walled place. We filmed an IMAX documentary about the siege and last battle(s) there.
One interesting thing is that when the set construction team built the chapel, they inadvertently made the columns backwards, with the spiral fluting going the wrong way.
Apparently the photographers printed the images in reverse, like a civil war image. and the set construction crew used them when building stuff.
Also, they built the chapel (and thus the whole facility) facing the wrong direction. Thus, we had to film most of the early morning scenes in reverse order to show the sun coming up, when in reality we were watching it set.
It was a true PITA (for many reasons) but the end result was worth the time and effort. It was titled "Alamo: The Price of Freedom.
Here is a link to the trailer