We stayed for 7 nights when we went to GKTW ! I think it depends on the wish organisation that is arranging the trip.
I can guarantee you that the stay at give kids will be the best time of your life. We are planning to go bk to visit gktw when we are bk in florida just because it was so fantastic and everyone there was fantastic.
If you have any questions about gktw I would be more than happy to answer them.
Louise x