We went to two MVMCPs last week- Sun and Thursday. Our parties were not crowded for most of the rides- the exceptions being the usual high priority rides. We walked on every ride that we wanted with those exceptions. I would be at 7 Dwarves 5 min early. You should be able to be on the ride within minutes. We rode 3 times with FP+ during our stay and it was minutes before we got on the ride. The ride of course is very short. With luck, that entire process will take only 10 minutes. Then walk very fast to CRT. When we tried to check in to CRT ( and BOG) last week 10 minutes early as instructed when we made our ressies, they told us to come back at exactly the reservation time, not earlier. You should be able to make the CRT ADR. Then enjoy the experience!
We were very glad that we went to the parties due to sheer number of rides that we rode. Have fun and relax!