The staff will adjust your jump time according to your arrival except during peak times such as weekends between noon and 5. Call ahead and ask for special allowances for such changes. All in all they are very willing to help.
As in time of arrival or amount you play? When you go in person, you give them a slip of paper with your info after you register. They then ask how long you'll be staying, and they give you a paper bracelet accordingly You can play up until they announce that color to finish. My guess is you can specify to start whenever.
I don't know. We just pay when we go.
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