Excellent campground with a great atmosphere!
Otter Lake is truly one of the nicest and cleanest campgrounds I have ever been to.
I saw other reviews about bugs and whatnot.. ignore those, it's camping- thats what happens when you camp - there was nothing out of the ordinary.
The only beef I had was that I was on the seemingly only "unlevel" campsites with the RV - I say only because looking around at everyone else, I was the only one on leveling blocks. It made sense too, because the site is located where there is a natural incline (site 10).
Each site has plenty of space, and plenty of privacy, I recommend this campground to anyone visiting the Munising area! One hint though - plan some time at the campground! It is an attaction on its own.