We're planning a trip to WDW for 12/08, our son will be 2 1/2 at that time. He's tall for his age, but still sleeps in a large crib. We've been trying to segway into a toddler bed, but he's a roller, keeps falling out. We're wondering where to put him to sleep in the hotel room. I know about bed rails, not so sure they'll work for him or be easy to bring with us. The cribs at the resorts are a bit smallish, afraid he won't fit comfortably. Any suggestions?