Good luck in your search for a group; there are Jeep clubs all over the country, maybe post in the TX section of this forum? Texas Jeep Forum - Jeep Wrangler Forum
As for the lift, you must decide for yourself how much hassle you want to go through. Dealerships often try to point the "you modified it" finger when denying warranty claims, but they only have legal grounds for denying warranty on the specific parts you have modified. They may give you a hassle about it, but a lift should ONLY affect warranty claims against the control arms/brackets, springs, shocks, track bar. MAYBE the brakes, hubs, and ball joints if you put larger tires on it.
You would be able to argue for coverage of engine/transmission/transfer case/gearing/axles since a mild lift/tires would put no more strain on these components than towing stock or running stock within the max load limits of the vehicle.
Body/frame/electrical would be completely in the clear. Most of the warranty claims i see referenced with regards to the new Jeeps are:
-Nav/Radio/Phone connects not working
-Oil consumption on the 3.8, Bearing knock on the 3.6.
None of those would be denied on grounds of a lift, though they may make you jump through some hoops on the engine one.