You would have much better luck by contacting RV parks directly. I don't think many owners monitor RV.net every day to see who might be looking for work.
Try going to
http://rvparkreviews.com/ and look for the cities you'll be heading to. It's not an all inclusive list but it's a start.
Joe, Mary and Dakota, the wacko cat
Fulltiming since 2006
2006 Dodge 3500 QC CTD SRW Jacobs Exhaust brake
2017 Open Range 3X388RKS, side porch