Yeah, a Mystery Mine works *perfectly* in that spot. And I like the idea of having Roaring Falls out there on the back part of the lake; that works really well.
Since I never had the chance to visit CC, I had to do a quick Google search to see which ride Accelerator is... That would be SOOO cool to have! I love the Detonator at Worlds of Fun, so having a similar ride at SDC would be awesome. And it can easily be themed to fit in at SDC properly.