My husband and I want to attend the MVMCP when we go in Nov. and the first one fits our schedule best with ADR's and such, but my grandma is having some health issues and I am afraid to buy them ahead of time in case we have to cancel our vacation. I am afraid not to buy them too in case we go and then it is sold out and can't go at all. Just how busy is the 1st party of the year? And do you think I could wait to buy them when I get there?