If you are ever in the San Marcos area the CAF has some aircraft there that are nice. Ususally a P-40, P-39, Cub, T-33, B-25, several SNJ/ AT-6 types other L types and O types and some nice models on the second floor. They are housed in an old wooden hanger on the airport.
If you are in the San Antonio area, Lackland AFB has alot of aircraft on display but not in great condition. There is also an indoor museum. They used to let you on base without any problem but you may need permission for "homeland security".
Most aircraft are outside and painted in the wrong colors. The B-24 they had was shipped to the UK for the 8th Air Force Museum. They had a B-17, P-47, P-63, B-25, A-26, P-38 as well as other aircraft past WWII to the present.
The Lone Star Museum is the best, which is on the airport in Galveston next to moody gardens. All aircraft are inside in an air conditioned hanger and as many as possible are brought up to flying condition. They have a B-58 that I don't think will fly again but who knows.