I guided this for 3 years. SITM seems to be the biggest hit around 4500 cfs.
3 or 4 ways to run SITM-
1a- left to right- hit the meat. Tends to be the biggest hit
1b- great to do with custies- left to right, same as above, but moments before the rapid tell everyone (paddle boat) to run to the front of the boat. Can submerge crew if the wave is good- acts like a torpedo.
2- Same line as #1 but backpaddle prior to rapid. enter SLOW. Boat will stall on the wave, fill the entire raft (if not entirely submerge it), push you left into the closet missing magnet wall by about 15 ft. (eddies out before magnetic) Is fun. Then, eddie out of the closet once the boat drains, and cruise by magnetic wall. The trick of this line is to still be lined up w/ the laterals the whole time, yet enter as slowly as possible.
3- right to left into the catchers mitt. Smaller hit, and can back ferry towards river right so no where near Magentic wall. Make sure to line up with the larger of the 2 laterals making the catchers mitt!
4- far right sneak. Don't know it, never ran it.