OK so I live in New Braunfels (between SA & Austin on I-35)about 30 miles from Wimberley and I keep my horses at my mom’s place near Canyon Lake (off of 281).
As far as eventing trainers nearby you are pretty much SOL! Sheryl Lewis is wonderful but she is about 1 hour from Wimberley in Fair Oaks/Boerne area. Donna Kinney and Diane Hanrahan are also in the Boerne/Fair Oaks/Leon Springs area (off of I-10 Northwest of SA). I think Rick Urban is also over there but I am not sure. As far as eventers in Austin there is Anna Beason.
The San Antonio area is not a mecca of eventing but I am sure it is better than Lubbock :D.
Greenwood is about 4 or 4.5 hrs from Wimberley/Blanco
Holly Hill is about 8 or 9 hrs
MeadowCreek is 4hrs
Pine Hill is about 3 hrs
Tipasa (Feather Creek) is about 9 or so
Tyler is 6 or 6.5 hrs
So pretty much is all closer than Lubbock 
I hope Wimberley is not as rocky as my moms place. If we could sell rocks for less than a penny we would rival Bill Gates :lol::lol::lol:
Are you going to try and teach at Texas State (Eat 'Em Up CATS!!! I am an alumni :D:D:D)?? TX State is only 20 minutes from Wimberley.
When you come down, you can come over and we can ride at my moms. She got a lighted arena and a jump course (most of the jumps need to be repaired (they have dry-rotted :)) not to mention trails.
Yay, when are you looking at coming down?