We are thinking about a trip to Schlitterbahn this summer. Actually, a few days at Schlitterbahn and then a few more days in San Antonio for sea world and riverwalk. Looking at Schlitterbahn's website, I am confused about staying at the resort there. If we arrive on Sun at 3pm and check out Tuesday, do we get access to the park all 3 days, assuming we pay the $25 per person rate for those days? Can we arrive earlier on Sun and get to play that day too?