Rock lake campground B is for tents. Has great sites right on the water, ( no privacy at all) no tree cover. There are also sites further away from the water and somewhat closed in. I liked it because it's close to the booth lake trail, no highway noise, no slamming trailer doors or generator noises, has swimming beach all along most upfront tent sites. But it might be real busy as in booked solid in August, therefore may not be what you're looking for.
However, it's fun to take a canoe and paddle rock lake, there's islands, the dam to galeiry lake paddle is a nice afternoon trip. If the kids holler loudly along the higher rock cliffs on that paddle they'll hear their echo.
If they like to fish then just below the dam in the fast water maybe fun. The dam is very wide, not high.
But even better, there are also paddle in sites on rock lake if youdd like more of a challenge.