Unfortunetly, my only experience with Camelback is with going on weekends when it's a madhouse so I'm not sure I'll be much help.
Yes, most of the traffic tends to be concentrated near the easier trails. The lookers right side of the mountain is usually the most busy as that's where most of the lifts are. Looker's left is normally where I spend most of my time. Nile Mile to the extreme left is a nice blue to cruise as well.
edit: I've done night riding as well and everytime I pack it in within an hour or so. It gets icy as hell.