Lots of RV sites but we were able to pitch our tent by the beach and there was plenty of space. Got super windy by the reservoir. The woman at the golf course clubhouse, which is also the front desk of the campground, let us cook dinner at the tables behind the clubhouse and use the outdoor bathrooms there.
I live in Denver. I sail in Maine and commute in my minimalist camper van. Returning West, I was tired and it was getting dark and a big storm was about to bust loose. I looked at my map and saw a patch of green with blue in the middle, right off the highway and headed for it. Sutherland Park State Recreation Area is on a lake formed by a dam with a small hydropower plant. There's a campground away from the water, but it was deserted and creeped me out. The other camping was by the lake. Nice breeze. $7/night. Pay at the bar/golf course club house serving the locals.