The campground at Jay Cooke State Park is really nice. The sites are well maintained and private (for the most part. More on that later), and the shower and bathroom facilities are really top notch. Plus, lots of great hikes nearby and only 25min from Duluth.
Sites: Most sites are very private. There are lots of trees and foliage in between, so you really can't see your neighbor - at least this was true of the loop I was in (site 18). We didn't walk around all the loops, but the one we noticed had less privacy is the loop with sites 24-37. The center sites (27, 29, 34, 36) are all pretty open and didn't seem like there was much definition between spots. So, good as a group, but maybe less desirable if you're looking for some privacy.
My site, 18, was nice. They're all a little tight, so multiple large tents isn't advisable. The only downside to 18 is it is right next to a pit toilet. They're well maintained, but if the wind blows a certain way, you may have a faint scent. I'd probably opt for site 19 or 21 next time.
Pros:
> Really nice facilities. The separate shower rooms are fantastic. Water is hot!
> Easy access to lots of great hikes
> Sites are well maintained. There are tent pads at every site that I saw. They're flat and level.
Cons:
> There are active trains in the nearby town. I was having trouble sleeping one night and heard the horns well into the night (1 and 3am). They're not super loud so I'm not sure if they would have woken me if I was already asleep, but if you're a light sleeper I'd bring earplugs just in case.
All in all, I really enjoyed Jay Cooke and would be happy to stay here again!