Welcome Home, double neighbor! We too own at both BLT and AKV.
Many members do split stays. Some to save points and sometimes to try out different resorts. The day you move you call Bell Services and let them know you are checking out and moving to the other resort (AKV). They will store your luggage and food items (refrigerated and frozen) then move them to the other resort so they will be there when your room is ready there. You can go ahead and go over to the new resort and check in. Then go on to the park(s) or explore the new resort and pools until your room is ready. When your room is ready you go up to your new room, call Bell Services at at the new resort and request they bring up your transferred luggage and food items.
I won't say that there are never problems with luggage transfers but it although it is seldom sometimes things go wrong. Sometimes they are unable to find a piece of luggage or food sack. I have seen on some posts that the items are later found or Disney has reimbursed people for their lost items. But many more times everything goes well.
We are newer members and will be doing our first stay at BLT in March. In October we plan to have a split stay and will have more direct knowledge then about using Bell Services' transfer service.
Check out
work2play's thread regarding the views at BLT.
http://www.disboards.com/showthread.php?t=2257082 You didn't mention what type of villa or view you are considering for each resort. If you have a lake view you could ask for a north crescent, high floor in hopes that you will get both a LV and an MK view. Some of the LV's on that end can see both.
AKV - I would stay at Kidani and get a larger room. I would select a savanna view and ask for one on the sunset savanna (supposedly more views of animals) and that the villa be located on the 2nd or 3rd floor. The second floor is the first floor for villas. I would stay at Kidani and get a larger room.
FYI, and requests you have regarding location and views for your villas are not guaranteed, but the resorts do try to get you the best room available in your category and consider your desires.