Before this year, we had done split stays for every trip for the last 6 years. This year I've been treating myself and just staying at the Dolphin the entire trip.
We drive down from Athens, GA, which is about a 6 1/2 to 7 hour drive depending on if I'm driving or my son is. We usually get there between 2 and 3 in the afternoon. Since we go directly to a park after dropping stuff off in our room (if it's ready), I don't like to pay deluxe prices for that first night. So, we stay at either a value, whichever one is less, or a moderate, whichever one is less for the first night or two. My thinking is you have to bus to AK no matter where you stay so day 2, which is the first full day, is spent at AK. When we get to the resort, we just go to the bus stop and hop on the first bus that arrives for that short arrival day. If we are staying two nights, 2nd full day is a MK day, since we stay at the Epcot resorts, we have to bus to MK anyway (I'm not a fan of the monorail when it is running) so we knock that one out while staying there.
On move day, we get up when we get up, which for me is usually around 7, pack up, eat breakfast and move the car to resort #2 and check in. Every once in a while the room is ready but rarely so we store our bags with bell service and head off to what ever park (AK or MK) we are doing that day. Sometimes we go to the room when we get the text it is ready, sometimes we don't. Just depends on what we are doing at the time. The rest of our time is spent at Epcot and HS, which the occasional couple of hour hop to AK or MK.
We have stayed at all the Epcot resorts, my favorite is YC but for the last 3 years, Swolfin has been our pick. It just depends on what resort I can find for the less during our stay.