Desolation Wilderness, Sierra at Tahoe, Northstar, Almaden Quicksilver Park
I have a 20L Burton and it will hardly hold my 14" Sony. My wife has a 17" gateway and I can tell you it doesn't fit or even come close.
I have a 20L (1400 cu in = ~22L) Burton pack that is perfect for one person to carry some water, snacks, a light sweater etc. Use it all the time for sports events and day hikes. If its just gear for you, it'll do the trick if you're careful what you lug around. I prefer ones with skateboard straps as I strap my sweater/jacket to the outside to make more room, but that's your call.
Not to my knowledge, it helps you know its on, which I find really useful when its strapped to my helmet.
Yes it does.
Yes, it comes with waist gaitesr with Link ZIP Jacket-to-Pant Interface that works with other Burton pants with the same tech