I know you expressed your desire to avoid I4, but I thought someone should mention that the entrance lane onto I4 going west towards Disney becomes the exit lane for Epcot Center Dr, from which you can get to the MK, Epcot or DS easily; you never have to change lanes and it's less than a mile. You can use Hotel Plaza Blvd and Buena Vista Drive, but there are a ton of traffic lights that aren't synced together; it always frustrates me going that way as you always seem to be driving from one red light to another.