I was just there last week and also in November. They are going by reservations when you buy your tickets. Check their winter hours. When I was there last week we went on a Wednesday the hours were 2pm til 9pm. They were closed Monday and Tuesday. They are doing temperature checks and the usual coronavirus related questions.
Its better right now to do it online since they have limited capacity
Yes
Yes, you can buy tickets at the gate. There was a line when I was there as only one window was open. If you can buy online that would be better. You will be sent an email that has a link and you just show it from the phone. Check before you go that they are not sold out.
Depends if they are at capacity or not. Its best to buy ahead and ensure your entrance
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