We stayed off-site last week and decided on Friday 9/21 as our morning to try for RSR. I was pleasantly surprised by our experience.
Park opening at 9:00. We arrived at 8:30 and the gates were open.
My DH lined up in the RSR fastpass line. He was standing just past Cathay Circle Restaurant. The rest of us enjoyed Buena Vista Street, took photos with Goofy (everyone was ignoring him, so the kids got to visit and play with him for a while).
At 8:55 we strolled over to the crowd near rope drop and while everyone else walked towards RSR, we went into Luigi's and had a 5 minute wait.
By this time it was 9:15 and my DH had our fast passes for RSR (return time 11:05). We took a few photos in Carsland, then headed over to Toy Story, grabbing fastpasses for CA Screamin on the way. Our wait for TSMM was less than 10 minutes. Then the kids spent a lot of time riding Jellyfish and Goofy's which they walked onto about 4 times each with no waiting.
We went on Monsters Inc, watched the Franken Weenie preview and by then it was 11:00, so we headed back towards RSR. The standby line was posted as 90 minutes, but with our fast passes in hand, we were in a car in about 5 minutes. The ride was amazing! It was our one and only time that we rode it this trip and we all agree that it is our new favorite. But we were all happy that we got to ride it and that we didn't spend too much time waiting in line or waiting for a fast pass. It didn't have a negative impact on our morning and we were still able to do Toy Story and other attractions.
I was really worried that we would have a tough time because we didn't have early entry to DCA, but it worked out fine! Hope that helps! Good luck!