I have never used the service that you have mentioned, but I can offer an alternative, if you will allow. I do not stay at the resorts often in comparison to the time that I spend at WDW, but I have stayed at a resort three or four times during the Christmas Holiday Season over the years. We have always taken our own decorations and done the room ourselves. This has included lights for the window and the inside of the room, clings or ornaments for the window, a wreath and garlands for the walls, and a small artificial tree. We have at times heard people outside of our room commenting on the visible decorations. I personally feel that it adds a bit more when you decorate yourself with a more "personal" touch. These items take up a comparatively small amount of space within a suitcase. Anyhoo, it's just a thought for consideration.
Regarding the gifts, we have gone as close as the day before Christmas and a few days after, but we're always home for the Holiday and the accompanying gifts in order to adhere to family traditions.