Be aware that the park map and the reservation system map have numerous discrepancies. Both have errors in placement of campsites!
Sites that appear to be waterside on the campground map are actually up on the bluff. There are no sites that are actually on the water. Sites with a great water view however include 19, 23, and 24. Sites 19 and 21 have good views as well.
Keewaydin has a great boat launch and dockage for your boat.
For the kids, Keeywaydin has a great playground along with an oversized pool located behind sites 41-46.
The park does tend to get quit crowded in the summer months with lots of trailers and vehicles. Spacing between sites is rather limited. Check out these drive through video to get an idea of what too expect in summer months: https://www.youtube.com/watch?v=twZ57JgdA34 and https://www.youtube.com/watch?v=IvCn8lGlwjE.