In the mornings their buses will either share with the Contemporary or Grand Floridian before going to Hollywood Studios, Animal Kingdom/Blizzard Beach and Downtown Disney/Typhoon Lagoon. Now if they share with the Contemporary the Polynesian guests will be picked up 2nd, however if they share with the Grand Floridian you will stop there before going to your final destination. However in the afternoon/evenings the Polynesian shares their bus routes with the Contemporary and Grand Floridian, so here is the order of pick ups/dropp offs. #1 Contemporary, #2 Polynesian and #3 Grand Floridian.
Well the only way to know for sure is when you are going back to the Polynesian. When the bus arrives it will say the resorts it will stop at on it's electronic signs. Plus the bus stations themselves will have a sign which list the resort it stops at.We found that we never knew if the Poly bus was going to share with GF or CR. Sometimes the Poly bus did not share with either. I wasn't sure how I would feel about sharing with other resorts, but I honestly did not mine. Stopping at either resort really did not add too much on to our travel time. The only time we had standing room only, was the bus to DTD.