Somewhere I read about a couple rides that are not connected to the fast pass system, one being Roger Rabbit and the other Grizzly River? Is this right?
Yes, they are both independent. So in reality you can hold get 4 valid FP at the same time. 1 @ DL, 1 @ DCA, 1 @ RR, and 1@ GRR. Be aware though during lower crowd levels GRR doesn't offer FP everyday. I forget which days they do but it's something like S,S, M, T or TH, F, S, S.