Let Disney do it- its super easy and stress free. The morning you are leaving one resort, just take your luggage to bell services and let them know what resort its going to. They have a drawer full of luggage tags- a different one for each resort. They put those on your luggage. When you check into your new resort and get your room, just call down to bell services and they will bring your bags up.
A lot of people think- oh my gosh what will I do without my luggage til 3pm?? Just take whatever you might need that day in a backpack, its really no big deal.