I tend to go to WDW every Dec...I keep saying that I'm not going, but I end up booking!! And I love to visit the various resorts each year as well...it never gets old for me.
This is how I do it. I head to MK, then walk over to the CR, check it out. Then onto the monorail and go to the GF...sorry, but the Polynesian has not gotten it done for me in several years now...then back to the MK. I take a boat over to the WL. Love it there.
For the Epcot resorts....I leave Epcot through the International Gateway...check out the BW, then the Dolphin, then head to the YC/BC.
The other resort that I like to check on is AKL...it's not traditional but quite lovely.
I've never seen SSR, maybe have to check it out this year.