Nontraditional Wedding Registry Options

My fiancé is in the army and is stationed in Alaska. I'm planning on moving out there with him after we're married in June, but we don't know what to do for our registry. My bridal shower is in December because I also live out of state and around the holidays was the best time to have it so more people are able to attend. When I move out there we are planning to get a house or apartment, so we will need all of the things typically on a registry. Right now he's living in the barracks on base though and doesn't have a place to store things if people send us gifts. Also, if people bring things to the shower/wedding, paying to ship items to Alaska is extremely expensive and often not worth the cost of shipping the item. Amazon offers free standard shipping to Alaska, so we were thinking of asking for Amazon gift cards that we could use after we get a house/apartment, but I also like to idea of having a registry where people could give money online. Has anyone ever used something like this?