I checked into otter a little. all boats 35 horse and under need a 50$ sticker, boats over need a $100 sticker. one day pass is 10$ and three days 25$ there is a "quite time" that begins at 11 every night. it says no noises that could disturb anyone. all the camps are pretty much on one side though so I doubt a generator would be an issue as long as it wasn't right next to the camps. this lake has a reputation for being under nazi control so who knows.