Interestingly, I just tried unsuccessfully to make reservations at Balmorhea SP by going to RA's website directly. I kept receiving error messages and statements indicating that sites with my search criteria were not available. However, when I went to RA's website via the Internet Reservations link on TPWD's reservations page, no problems. Got just what I wanted.
TPWD: State Park Reservations
The RA pages I was directed to via the TPWD link looked somewhat different and definitely worked better. RA definitely still has problems and I would have used another reservation method if I weren't trying to firm up plans today.
JohnK