4 days is a little short to have to move. If you have no other choice, then yes, but i would prefer to stay at one resort for such a short stay.
BCV is busy this time of the year and you may not get into your room until 3pm and then checking into VWL the next day and waiting for room to be ready there.
We have a split stay coming up, 7 nights at BCV and 6 nights at SSR over Christmas and NYE, and I like to decorate for Christmas. I'd rather put it all up once and take it down when it is time to leave so Im thinking about that now. Food is another issue with moving, they will refrigerate it for you, but it is still a worry because things can and do go wrong.
If our waitlist comes thru for all nights at SSR, I would switch in a heartbeat, I like to stay in 1 place because packing is packing, no matter how easy they make the move.
The good thing is, you can preplan your packing and you probably dont have as much stuff as us, so if you do choose to move, you can pack accordingly.
And momsgoofy is right, you will get to use SAB on your checkin and checkout day
