You didn't say when you are going to Austin. Balmorrhea is an excellent stop. It is at desert level and the campground is not shaded and has water and electric. the main attraction at Balm. is the spring fed swimming pool; you can swim with the fishes. If you are traveling during the warmer months, you might consider Davis Mtn. state park, right outside of Ft. Davis (about 30 miles from Balm. and more alpine; water, elect, full hookups). There is also a lodge with a restaurant at DMSP; also near McDonald Observatory.