I would like some opinions please. This is our first trip to Disney our girls are 7 & 8. We are staying at the Fort fo 2 weeks in December for Christmas. We would also like to go to other parks Universal, Seaworld ect. too. I know this is going to be a hard one to answer but how many days should I buy for the Disney park? There may be days when we just want to sit on the beach or our campsite and do nothing. Thank You Amy