We fly out tomorrow & 1st day in the park is Sunday. At the time we booked, I could only get HS on Sunday the 17th. With the release of more availability, it is showing availability every day except the 17th. Should I switch my days? Would it be less crowded on a weekday or is it a park that's crowded regardless? I also wonder is it not available on the day we're currently scheduled because possibly Disney isn't increasing availability until after the weekend?