Yes
Yes you can. But try to get one when you renew your registration, its a few bucks cheaper.
Yes. During the Summer season, the entrance off Glengary booth seems to always be staffed.
Yes. When my group is there for our April weekend, a nice ranger comes by on Saturday with a cash till and a sheet of window stickers. 2018 update: they now charge a convenience fee for this. Better to order your sticker ahead of time.
Thx everyone hopefully they are open on Sunday
It's the same price to purchase at the park
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