We are planning our first trip to WDW in October. My dh, myself, and two dd's who are 3 and 5. Also joining us is my sil and nephew, who is 11. We are staying offsit at a Premier Home. Will it be a big hassle to drop them off at a different park like MGM and then us proceed to MK? Or would it be better, say, for us all to go and park at MK and then them catch a bus or something to a different park?