Daughter's friend did go to the beach with us for a week in early summer and her friend took our daughter to Maine in late summer for a week. Our parents, who also came on the trip, paid for our beach house, and we drove. We paid for everything else though. This makes ABSOLUTELY no difference, though my daughter's friend's Grandmother who also went on there trip, paid for my daughters airline ticket and also the house they rented in Maine. Her parents paid for everything else, except souvenirs. I can understand the awkwardness of sleeping in a room with a strange family. That is another issue we are considering. Even though it's a totally different thing, the girl we're considering asking has spent the night at our house many, many times since she was in kindergarten.