Large, 3 inches tip of leg to tip of leg, was curled up under flap on RV cover, six feet off the ground
I think this is a golden huntsman, olios giganteus.
Giant Crab Spider–Olios giganteus
This is a type of Huntsman spider, and as you probably know, the Huntsman spiders can get huge. I found an O. giganteus this summer in Tucson, AZ.