Went in without a reservation. No problem. Pleasantly surprised to find out it's an Army Corps of Engineers park; meaning if you have a annual National Parks pass, you get a discount. Didn't know that. We paid $11 for a tent site. Lots of RV sites around. The whole area around Saylorville Lake has camping. Lush green plots of land everywhere. I forget how pretty it is in the Midwest when I'm gone for so long. Quiet, relaxing place. Friendly staff. We took a long walk through the campground and others nearby. Boating and swimming in the lake.