When I worked at the
Disney Store, 2 of the Cast Members were getting married around the same time and both couples were honeymooning at WDW. We gave them a shower and did money trees with Disney Dollars instead of "real" money.
I had so much fun making them! I used mini christmas trees and folded the Disney Dollars into hearts, strung them on pretty ribbons, and hung them like ornaments. There's a web site with different ideas for folding money into shapes (sorry I don't have the URL at work), and I'm sure you could have lots of fun with that.
Don't forget that Disney Dollars have different characters on the $1, $5, and $10 bills.
Also our male CMs, who didn't come to the shower, chipped in to send bride and groom MM ears to their hotel rooms. If your friend is staying on-site, the front desk at her Resort will gladly help you arrange this, but you will need to know their resort name and their check-in date.
If it's a Disney resort, the Cast Members may even do something special for the couple themselves, so be sure to let them know! When my DH proposed to me at MK many moons ago, the front desk arranged for a complementary bottle of champagne to be in our room when we returned from the park
Have fun!