We will be going from August 13 through the 18th. Should I stay on-site? If the crowds are fairly heavy at the time, I'm thinking I will stay on-site because of the front of the line access, I was thinking we could get to the parks early, do the parks until noon or so, go back to the hotel rest and/or swim and then go back to the parks in the evening. What time does the parks ususally stay open at night during those dates?