Welcome to the site. Here are a few links to get you started at Ft Sam.
Ft Sam Medical Services:
http://fshtx.army.mil/sites/services/medical.asp
Ft Sam Family Services:
http://fshtx.army.mil/sites/services/family.asp
Ft Sam MWR (Moral, Welfare, and Recreation):
http://www.fortsamhoustonmwr.com/default2.asp