Hello, Cristen! Thank you for cruising by to visit us with your question!
Disney Cruise Line does have a variety of staterooms
onboard each of their ships, which can be a huge help when trying to squeeze friends and family in where you can. I did a bit of research and found that cabin 9674 has a fold-out sofa and a pull-down upper berth - sort of like a bunk bed over top of the sofa. The upper berths are a bit small for a grown-up, but if you've got a smaller-sized grown-up in your party, it may work.
If you're not traveling until next Christmas, I'd probably see if there's another stateroom available that would more comfortably accommodate four adults without someone having to climb up to the top berth. Your best bet to locate that type of accommodation onboard the dazzling
Disney Dream would be to
reach out via email or phone to Disney Cruise Line.
Also, Cristen, I just want to mention that because you are cruising at a popular time of the year, it might be better to book your extra person now, then cancel later if you have to. Even though you have a room that can accommodate four people, the ship can still sell out and your room not be full. It may be harder to add a fourth person the closer you get to sailing.
Happy planning, Cristen!
Anna