There are numerous jeeps in the Alpine area as well as some that come in from other west Texas towns (as me).
Right now is the best time to be in the area as the temp get so high in the summer (then it is time to go to NM and Colorado).
There has been some development of jeep trails on the Lajitas Ranch/Resort, that is an on going process and access, rules (because it is a multi use property with hunting and firearm ranges), and trail development.
We are "scratching" the surface on trails in Big Bend Ranch State Park (BBRSP) which has limited use to off road vehicles as well. Bit of a learning curve there. We are also active in running in New Mexico and Colorado.
Attached is a small write up on a trip we did last month.
PM me with your email and I will let you know of any activities that we are doing (none at present just talk). Biotex, is a very active jeeper in Alpine and good guy (dont tell I said that) http://www.jeepforum.com/ubb/sssh.gif http://www.jeepforum.com/ubb/laugh2.gif
and we have run numerous trips together. If you are over that way, he has the local furniture store, drop by for a visit.