This is one of those places I'm tempted to keep quiet about. It's up at the top of Hecker Pass, that windy road that goes from Gilroy to Watsonville on 152. After you leave 152 the road is very steep but wide and paved. I crawled up it in 1st and 2nd pulling only the Campster
(and I was doing 55 on 152).
Once you get there, bypass the RV sites. They are nice enough, and there are showers in that area, but the real gems are in Loops 2 and 3, which have no hookups. Read the reservation list carefully as not all sites are long enough for a trailer. Sites are paved but a few are too steep, also. There are plenty of shaded sites, some more private than others, some close together if you camp with friends. Every site has a storage unit for food (protection from raccoons) and a fire pit with grill or stone fireplace with grill, and picnic table. Each loop has a restroom with flush toilets, no hot water, forced air hand dryers.
I'll just add a few pictures now.
My first two nights- slightly sloped, slightly short, but no problem, I could have backed up another five feet.
Big open site, but very sloped. I spent the last night here and could just barely level the trailer front to back. Side to side was fine.
Accidentally included the same picture twice and can't delete it, sorry.