Literally just a strip of grass
This site, as it were, is literally just a tiny sloping grass area next to the pool fence. When I arrived I literally stood around scratching my head looking for the site before I realized that I was, apparently, standing in it. I managed to find a level-enough spot for my 1-person backpacking tent after a few tries, but anything much larger than that -- good luck. For what still worked out to north of 100 bucks for the night, I can't say I'm thrilled.
BUT, that said, welcome to impromtu getaways in the Bay Area. Nothing is cheap here and I'm glad I didn't have to drive 2+ hours home late at night. I was up in Boulder Creek for the night to see a show, and this place is a 5 minute walk from town. The hosts were communicative, and really nice. The pool could be a nice bonus on a summer day, and there's a restroom easily accessible and everything.
I'd totally stay at the place again, but .Oliver. specifically? Yeah probably not.