More efficient would be to skip Epcot (unless you've been there earlier in the day or you have park hoppers and have been at some park that day).
Take the bus to DHS, then walk or take the Friendship Boat to Beach Club.
Take the bus to MK or AK, then transfer to the YC/BC bus.
As indicated above, take the bus (or boat) to DtD, then board the YC/BC bus.
Or, faster but more expensive - take a taxi directly from one resort to the other.
Unless you'll have a car - in that case, ask Bell Services for directions.