Are you able to do it as a quick DIY project?
I've decorated rooms twice for our DD. We've been several times for her birthday, since it falls nicely over fall break and during
MNSSHP (which we enjoy!)
I packed tape and cute decorations from the party store in my luggage.
Once at Poly, I sent her and DH to the pool while I decorated the room.
Other time at POP, I sent DD and her friend to get snacks and bum around the gift shop for a bit.
It was inexpensive, and took very little time. DD was thrilled!!