We like to make the day we switch our sleep in day. We do something late the night before we switch (like wishes, etc). Then sleep in, I do laundry and pack, call bell services by 10:30 (they will transport your luggage), and head out by 11. Stop for any pictures you want of the current hotel, get souveniers, etc. Head over to your new resort--we like taking a cab because we like the feeling of arriving at the main entrance, dorky I know--and then check in. We bring one bag with us with bathing suits, rain coats, toothbrushes, etc. and check it with bell services in case we need anything before our bags arrive. Then we plan a late, nice lunch, some pool time or shopping or mini golf, and get in our room after 4. By evening we are unpacked and ready to start the rest of our trip.
It's really not bad. I prefer not switching but I got out-voted by my family who doesn't want to stay in one place for two weeks.
One other suggestion, we like to split our stay between resorts in different locations, and then plan our schedule around the parks we're closest to. For example, you could stay at GF then BC, or (like us) SSR then BCV, or WL then BW, etc.
Jenny