Also keep an eye on the Skyliner times posted in each station. I noticed during our recent trip that it was open 90 mins after park closing. Not sure how often that happens.
Joining Remy closer to park closing could be a great option as long as it moves well. When we were at Epcot a few weeks ago we took our time leaving the park after it closed and the Skyliner line still stretched back towards Beach Club. My feet were toast so we grabbed a spot on a bench and waited for the line to reach us. Was a great decision although it broke down twice which 15+ min delays each time. Epcot closed at 9:00. Watched Harmonious from over near Mexico. Strolled to Skyliner. Entered our room at Pop close to 11:00.