I think it's buy 2 + 1
The rules and the guidelines constantly change if I were you I would simply contact customer service for information or when you go down there to Six Flags they can help you right on the spot
Your question is not clear. You should call customer service, so they can straighten out your passes.
You cannot add a member. You have to purchase them seperately and therefore will be managing seperate accounts. You can always email customer service to confirm.
You may have to buy another season passes. I think
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