You can do that if you don't mind using a park ticket entrance at Epcot today. And as long as Bell Services will be the one to transfer your belongings, no luggage is permitted on Disney Transport. You could also just take the bus to MK & walk across the street to CR/BLT,it is maybe a 10 minute walk from MK to CR/BLT, maybe less.
If you want to transfer your own belongings you will need to call a cab.
Sent from my iPad using DISBoards App, please excuse any typos or autocorrects!