California
Campgrounds in Stanislaus County
7 places to park or pitch. 2 of them take a rig on hookups, and the map colours them so you can see which at a glance.
HookupsRV sites with hookups2
Tagged as an RV park, a caravan site, or with a power supply. These are the ones to look at first if you need to plug in.
CampgroundCampgrounds5
Tents certainly and rigs very likely. Nobody has tagged whether there is power, so we are not going to say either way.