Just Googled and got 5 CG's owned by Thousand Trail Parks, 30 amp, rates 1 nite $35.00 regular, $32.00 on the Perimeter. Didn't find reviews that were not part of a TT web site (saw 1 review complaint was water quality,not an expert but I think most of the region has poor water quality). Looks like all the RV CG's pack em in like cord wood. Found a site with other private CG's but poor availability of information. Sorry.
If you do stay in Yuma, I hope you post a follow up, I'm curious how you will fare...
Bilgerat: Chuck, Kassie, Freddie, Lady, Prince, Smokey, Merlin
2000 Pace Arrow Vision 36', V-10, Banks, Onan 5500, Blue Ox, 2014 Forester, SKP 130599, FT'ing 2+Yrs.