Could someone please let me know if this is possible...I am planning to buy four 5 for the price of 4 day 2 park passes from Undercover Tourist. I arrive on a Thursday during Mardi Gras time. I want to use the passes through Saturday and then on Sunday upgrade to Seasonal Passes. This way I wont be blacked out of the Mardi Gras parade on the Saturday. If this is indeed possible...will I also get the 15 month AP deal when I upgrade on Day 4 of the 5 day tickets? Thanks for your help!!