The second image is of the loading area for the steam train. It appears this was loading line number 3. I like the gate and the signage on the lantern.
The third image is of the horse drawn carousel. The slide is a bit funky looking, but it does give that effect of you are on the ride.
The final image is of the exit area for the Stagecoach ride. The Knott's stagecoach ride always appeared to be more authentic, using antique coaches.