Whenever I've wanted to be near Fresno, I've stayed at the state park on the north side of Millerton Lake. They have electricity and water, as well as a dump station. The campground is somewhat remote at the end of a curvy road, but has quite a few trees and plenty of birds. Spring and Fall
are the best seasons; it can get a little hot when there is no breeze, especially in Summer. I stayed there one year when the wildflowers were in full bloom, very nice! There is a Casino on the south side of the lake, but I don't know if they allow RVers. I don't know of any other place in the Fresno-Clovis Area that doesn't involve a mobile home park. Fairgrounds maybe, I don't know.