We reserved only about an hour ahead on recreation.gov, upgrading our overnight plan considerably. With Dad's senior national park pass, site #3 (60' gravel for up to a 40' rig) (electric only) was only $8.50. As we were parking, the gentleman (Greg, we think?) caring for the park greeted us and on finding we had pre -registered, offered us an upgrade to a full hook up site (we could see only 2 other campers in the campground). Site 15 was a wonderful upgrade! Lots of wonderful birdlife here.

Note, bring your own soap to restrooms in many of the Core of Engineer campgrounds. For the amazing savings, its an easy enough change to make!