No .Feel free to just give them a call if you want any more information .
Atleast within the hour, you should be fine.
You can get away with it but they do timed tickets to control the number of people inside at given times. Life happens so just talk to them. If you couldn't get your time so you just picked another time with plans on going anytime you want then it's a jerk move.
You should be ok, within reason. Just talk to the receptionist when you arrive, they are vey helpful and accommodating
I dont think so
No
No they aren't super restrictive especially if their not busy
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