They are loud.....up until 11 or 12, I'm not sure. They must have a curfew because I've been staying there for 13 or 14 years, up in the little "cove" that's closest to Waukau<spelling> and it's never been a problem. When I go to bed (about 10) I hear them, but it seems like 11 or 12, they put a lid on it,totally. The noise isn't really that bad anyway. AND it's not a bad palce to eat supper and get a beer after all day on the airport. Matter of fact, it's really good.....and close.
Sleepy Hollow also runs a free (tips accepted) shuttle to & from the gate. AND most of the drivers are GORGEOUS.