Lovely quiet campground, clean and well maintained. I almost gave 5 stars, the only issue is that it's not super big-rig friendly (it's not impossible, just some of the sites have trees too close to the campsites, you'll see a lot of them have bumper-height scars, especially at the edge by the road, we didn't hit ours but it took us about 5 tries to back in playing dodg'em with the trees and had to go in crooked so our slideout wouldnt hit a shrubby tree). If you have a smaller camper you probably wouldn't have a problem, and there are several sites we noted would be easier for future visits (I hesitate to write them here since it could make them harder to get... 7, 11, 17, 25, and then 22 is the only pull-through). Also, if you come in from East Gull Lake Drive, there is a point right before you get to the recreation area where you think "this can't be right, I must have messed up!" (because the road gets narrow and looks like it's just going to some private cottages and there will be nowhere to turn around) and then there's a narrow one-lane bridge. I really recommend coming in on Gull Lake Dam Rd if it works for your route at all.
Another review mentioned how diligent the rangers are about quiet hours, the reviewer was writing it as a criticism but I read that and thought "that sounds perfect!". We did find it to be totally quiet after 10pm, if anyone who has anything to do with running this campground ever reads this, please keep up the good work!! We also observed that the volunteer hosts were extremely on top of cleaning up sites after people left.
For activities, there is a playground, fishing near the dam (with a fish cleaning station), a place to put in canoes/kayaks and the park rangers hosted a few activities like nature bingo and a hike. We were in the area for a family reunion, so we didn't participate in them but it was nice they had them and also that they told us about them when they checked us in. There is also a day-use area of the park, which we didn't visit, but according to the pamphlet it has a boat ramp, swimming beach, another playground, picnic area, volleyball, basketball and horseshoes.
In the campground is a clean shower house with flush toilets and then vault toilets in 2 smaller buildings that were not stinky. There are several water bottle fillers, which I've never seen in a campground before and we did take advantage of them.
We would definitely stay here again if we were in the area!