We have an old air mattress inflator that we got several years ago. I buy the cheap air mattress at Wal-mart and pack the air mattress, inflator, mattress pad and fitted sheet in the checked luggage. At the resort, I request extra blankets and sheets for the air mattress. Those air mattresses get a little cold on the floor, the more insulation between the person and the air mattress, the better. The kids don't mind the air mattress too much.
My DD wants to stay at the Contemporary again because they have a nice fold-out bed that she loves.
Marie