Just returned home on Saturday from our 7-day Eastern. Thanks to the original suggestion from FAWN, I did go out and purchase a twin-size Aero bed with a small motor attached, the night before we left. And boy, was I glad! Although we could have probably switched regular Cat. 3 room that would have had an extra bed, we felt very fortunate to have been assigned to the handicap accessible 8602 suite. The extra room was incredible, and we could have had a party for 25-30 people on our verandah . . . it was that big!
DS11 and DD12 would never have made it sleeping on the sofa bed together. The extra space the aero bed took in our suitcase was well worth it! The mattress fit in the corner between the sliding door and the desk in the living room at night. I brought my own sheets so I wouldn't have to worry about requesting them once we got there. The room steward folded the top sheet and blanket each day, and stored the mattress in the master closet (which was quite large) during the day. At night he would slide a few chairs around to make room, and then he'd make the bed up for us!
The aero bed was the best thing I packed, and allowed us to fully enjoy the larger space of the handicap room. Thanks to all for your suggestions, and happy cruising, BeanoC!