We were at a rally at FCS in April 2005 and really enjoyed ourselves. The RV park is nice and I don't remember but seems to me the sites were grass with dirt roads. There is a covered BBQ pit and a nice meeting room with a kitchen. I remember nothing about a laundry or the restrooms so I guess they must have been ok. The staff was very nice and very helpful.
Wild turkeys were in abundance and really not afraid of people at all. There is plenty of deer and other wildlife. The fort is a nature preserve I believe.
In the winter it will probably be a tad chilly to swim since the pool is a spring fed one but it is a beautiful pool for sure. The golf course has a small snack bar and the food is typical of a snack bar.
The fort is very pretty and peaceful and a great place to walk or ride bikes. The residents all get around on golf carts.
We went to Del Rio to Walmart and there is enough other stuff there to fill most needs. There also is Laughlin AFB in Del Rio and they have a nice FAMCAMP, BX and comissary. It's a small base but nice. This is about a 30 minute drive from the fort.
Right outside the fort in Brackettville there wasn't a whole lot happening but I do remember a small grocery and a gas station. Oh there was also an ice cream stand
San Antonio is about a 2 hour drive I believe, maybe further.