Horror.com Forums - Talk about horror. - Does this sound familiar to anyone?

I've been trying to remember the name of this movie for years now.... It is possible that I may be combining pieces of different movies together in my head, too, but here goes. A group of kids are heading out to some camp (very Friday the 13th-esque), and they're on a bus. The bus driver is a really creepy guy who basically is very nasty to these kids on the way to the campground.

They get to the camp and are basically being stalked by this hairy creature that turns out to be the bus driver's mother gone feral. I remember the kids trying to set booby traps to help them kill the creature and get away, and one scene in particular that I remember is that all the kids are sleeping beside a stream that they stop by for the night. When one of the girls wakes up, the creature is leaning down over her breathing on her.

Does this sound familiar to anyone? I'd really love to see it again, as it scared the hell out of me when I saw it about 20-25 years ago. Thanks for your help!