Yep, you can store your backpack at the complimentary coat check.
They have a complimentary coat check.
Yes, it is a complimentary service.
Yes you can :)
You can and you will be better of doing it. Otherwise, some will ask you not to carry that on your back. That is so you don't hit anything while at the museum.
Yes
Yes, it's complimentary at the coat check. FYI, they won't let you take your backpack into the bathroom near the main gift shop.
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