Here is a site for starters:
http://www.workamper.com/WorkamperNews/WNIndex.cfm
Many of the State Parks, BLM & National Parks advrtise---some paid positions and some just provide spaces/hookups. Some of the larger recreational areas have private contractors who run the concessions, like at Lake Powell:
http://www.lakepowelljobs.com/jobs.htm
Let me----I retract that---let us know how you make out.
Thomas J.
'05 3500 DRW Duramax Crew Cab
'04 Montana 3685 FL
"What WAS the greastest thing BEFORE sliced bread?"