We bailed out early on our UP vacation, and needed a place to stay - this SP won.  Based on the map, we expected the camping equivalent of an old Motel 6:  that's what we got.  We stayed in the far north loop, site 53.  Nothing on this side of the park loop road is even remotely level.  Power is a single outlet station per 2 campsites, ours was on the left (passenger) side of our camper.  We had to practically park in the site next to us as our power cord is not infinitely long.  Sites are really close together.  The park was pretty packed (trailer+3 cars in many sites - wha???), and made for difficult driving on the road.  The shower house/bathroom was clean, but really old - lots of chipped tiles, janky showers, poor lighting.  Beach area on the North Loop was also less than spectacular.  Again, this was just a place for us to stay a single night, and it served that purpose well.  Would not go back again, unless I was in the same situation.