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pbwalker wrote:My vote is for Pedernales Falls State Park. The primitive camping is secluded and the park had awesome trails to hike. There may not be much of a river there now, but it's a great park nonetheless.

As of 12/01/2011:

12/01/2011 - The Park is currently allowing campfires but conditions are still very dry & fire restrictions are being reevaluated on a daily basis. Visitors should contact the Park directly for the most recent information.

The following is from the Pedernales site but I believe it is true of every state park with primitive sites.

....hike-in primitive campsites (X mile minimum; no pets allowed; no groundfires; self contained fuel stoves only)....

I saw lots of "Camping Areas" along I-20 in Odessa. You'll have to hang an automotive air freshener from the tent pole though if you want that fresh piney woods smell.