Hello Gina!
Not too long ago I traveled with a large group of friends to the Walt Disney World Resort, and we stayed in a Treehouse Villa at
Disney's Saratoga Springs Resort. We had a GREAT time at the Treehouse Villas, and I think you will too! They are well suited for rest
and group interactions and are set in a lovely setting.
While I slept comfortably in the twin size sleeper chair, another friend made her sleep home in the top bunk. She had no complaints about the bed. As far as an official weight limit, I couldn't find any official restrictions. I am not a small woman, and I would have no fear of sleeping in the top bunk.
I hope this helps with your planning! If you have any more questions, come on back to the Disney Parks Moms Panel- we love to help!
See ya real soon,
Anne