Here's something different. I have for sale a crib I made for my 4500. This takes the place of the bunk in the front of the camper. It worked amazingly well, my daughter as just out grown it. It is essentially a plywood unit that is attached to the front bench, under the cushion. Lift the cushion and a padded panel flips up to create a wall. Pics. are worth a 1000 words!