To get from any resort to FW you will need to take a bus to either one of parks or to DTD and then transfer. If taking a park bus, you will need to know the park hours because the buses will stop running 1 hr (is that right) after the park closes. The DTD buses run until 2 am (I think).
I would recommend for the trip to FW, taking the bus to the MK and then transferring to the FW/WL ferry boat. This is a lovely way to arrive at the Fort. From the marina, you can either walk the 1/2 mile to the Meadowlands Recreation Area where the movie is or wait for an internal bus.
After the movie is over, unless the MK is open late, you will want to take the internal bus to the Outpost (front of FW) where you can catch a bus to DTD and then transfer to a POP bus.
It is a long process, so if you have a car, you may just want to drive to FW - show your resort ID at the gate and park at the Outpost ... then take the internal bus (or walk the 1/2 mile) to the Meadowlands Recreation Area.