Here's an idea..what if they will load at the Riviera by just driving into the slow moving gondola with the help of a CM ..same as they help them into the buses and boats...and as seen in some other gondola systems. Then when they get to CBR or Epcot they will be able to unload in the second loop where it stops with the help of a CM. For those returning to Riviera.. a CM can ask those in
Ecv's if they are going to Riviera and load/ back them in at the station "CBR and Epcot" where it stops to where they would face the doors. Then when they get to the Riviera they can just drive out facing forward.
They move so slow a CM can board the gondola and have enough time to help anyone drive out if needed.
There should only be 1 ecv per gondola because of needing to have a bench down for people to accompany a rider in a ecv..I don't believe they will allow standing so 2 ecv's are not possible.