You could always get some of the 3M removable hooks, but they would not be reusable.
The suction cup hooks were probably the most useful things we had on the most recent trip. There are few places to hang towels and swimsuits to dry.
We also have night-lights in our Owner's Locker. It is nice to have softer light through the villa when walking around at night.
As a PP stated, it is good to have batteries, too, especially if you have little ones and buy stuff for the kids. We bought a remote control monorail on our most recent trip, and we could not find a 9 volt battery or
AAA batteries anywhere. You would think that Disney would sell batteries that are needed for their toys.