I think it's a great idea too! a friend of mine did it through their hotel in Maui...I think the Princeville? They too pretty much had everything and just wanted to "treat" themselves to spa, surfing lessons, snorkeling, etc. I tried to buy for them, but it was too close to their departure...one thing with their registry that was a bummer, had to buy weeks maybe even months in advance of their stay. Don't know the details of the other HM registires. I say go for it!!