I would suggest doing this the day you visit the Magic Kingdom. Once you leave the park you could take the Resort Monorail to the Contemporary and from there take the boat that goes to the Wilderness Lodge. Once that your finished there, take the boat back to the Contemporary and then get back on the Resort Monorail so you can visit the Polynesian and Grand Floridian.
Or you can plan lunch or dinner at one of the resorts. Check out the decor at one prior to your ADR then hop on the monorail after lunch or dinner to check out the next. Have some dessert there and onto the next...
WL is actually off of the monorail line so you have to take a bus or boat from MK. The boat is actually a nice ride this time of the year. You can do that on MK day and plan lunch at WCC and check out the decorations then.