Some great spots to explore within an hour or so.
As Rob said, check out UBCP for a lot of UT options.
Since you stated camping, I'd plan on at least a night at Marble. It's PPR, so sign the waiver now.
http://theraf.org/airport/marblecoLots of good info at FlyColorado.org on stuff in CO. Unfortunately, not too much in the Rangely area.