I want a Dark Ride more than anything there issue is space. Ive done all the measurements and you'd basically have to take out everything left of the river/rock waterfall area to even fit a small dark ride and the queue needed.
That's why in my dreams, the expanded ghost town area behind Ghostrider, I always imagine a family land there with a family Vekoma boomerang, and 2 kids flats over there, thus allowing the space to take out Mud pits, The Ferris wheel/Swing area, candy shop, Tugboat, drink stand etc. and build a dark ride. A perfect world its a mountain rock facade that blocks the outside of the park, creates a tunnel for the Stagecoach (if possible) and adds a new cool entrance Knotts sign for Beach blvd corner on the opposite side.