If you don't have access to anything else, why not go with pvc? Should be pretty easy to find some cedar trees somewhere around Ft Worth but, if all else fails, pvc will work. Do a search on here for 'pvc condos' and you'll find a lot of different ideas. Ernest put up some pics that I copied 7 or 8 years ago that still produce crappie and suspect they will for years to come.
I'M SOONER BORN, SOONER BRED AND WHEN I DIE I'LL BE SOONER DEAD!
MEMBER WALLY MARSHALL'S MR CRAPPIE PROSTAFF
MEMBER JIGUM JIGS PROSTAFF