We observed rigs of various length including long 45' Class As. However, sites vary dramatically in length. recommend checking closely the site specs when booking online to obtain a site suitable to your needs.
You’d have to view their website https://azstateparks.com/reserve/patagonia-lake/camping/ to see the actual length of each site. They have a few 40-foot pads but most pads are 30-foot.
As I recall it seemed there were some full-sized rigs there. The photos posted should help. But it depends which site you are able to get as they are not all the same length.
