If it’s just adults, I’d vote for Boardwalk or Beach Club. Wonderful area and easy access to both Epcot and HS. If you choose Beach club, you’ll be able to take the Skyliner to HS probably faster than the boat.
Both areas are so pretty at the holidays.. Of course, you can’t beat the Contemporary for east to MK. I am actually staying at BLT around that same time..DVC owner..and looking forward to it. One thing for adults to do if you do choose the Contemporary is travel around the MK resorts to see holiday decorations and have a drink. We will be doing that...boat to Wilderness Lodge, drink at Contemporary, Poly and Grand Floridian!
I’m not a fan of Animal Kingdome due to is location..and not an animal person...and the fact that the o;ly way to all parks is bus.
Good luck!