We put up lights around the deck railing last time. There are two outlets between the two doors so you would need an extension cord if you want to put lights up around the railing. We tried to get a cabin on our pin code for our Christmas trip this year but couldn't get one. I was planning to put up lights around the railing and a big lit wreath on the wall between the doors (we have good outdoor suction cups). If you wanted to bring gutter clips, you could hang up icicle lights along the gutter too. It's not too high - you could stand on the picnic table.
My other thought was solar path markers - you can get Disney characters, snowmen, or just some color changing regular markers. There's room for some inflatables on the deck too if you want to "keep up with the RVers".
There are two windows that face out to the road, plus 5 or 6 more around the cabin that you can put decorations in - two in the bedroom, one in the bathroom, two in the living room and one in hallway between the doors.
Hope this helps. Try to rent a golf cart at least one night so you can go looping around the campground. We're planning an evening at the Fort for dinner, Chip and Dale and looping, ending on the beach for fireworks and the Electrical Water Pageant. We're renting a cart for the evening.