Never especially busy, lots of great sites. We chose an open spot (really 3 sites but in a meadow) so the kids had room to run and play. Multiple river access points made for a quick float for the kids. Lots of dirt roads for bike rides. Great mix of wooded and open sites.
Not overly-loaded with campers. Long paved roads for kiddos with bikes, but still really woodsy. We got a site right on Lake Michigan and it was amazing. Rocky beach access, wave sounds lulling me to sleep, view of the lake sunset from my fire.