The cake inside was the same red velvet and white chocolate icing from here (the cabin is a cupcake). I crumb coated the cake with white butter icing, to cover the darkness of the cake, refrigerated it for about half an hour, and then put on the final layer, also of butter icing - very simple for a change. The propeller I made out of white chocolate, and a couple of mini marshmallows, and some wafers took care of the rest!
Ralph helped so much with this cake. I put it in the oven and fell fast asleep while he timed it and got it out in time- and he fashioned the wafers and stuck then into the cake! My awesome teammate :-)