Group camping within an hour of Calgary?

[Coralgurl]

Weird to send this out when it's snowing, but looking for some group camping sites close to Calgary for 2014. Prefer something that isn't tied in with a campground for noise restrictions. Right now red lodge is top of the list, but it's 2 hours away. Anyone here have some fave spots to go? Will need something big, min 15 units.