Here's some additional info, now that we have "analyzed" our trek. We approached from the alternate coordinates, from the east, on Trail Drive. The trailhead is well marked and we had no trouble following the meandering path. The reason we approached from the east is that there is another cache right at the trailhead, Bell Cemetery GC20167.
Round trip from the Trail Drive trailhead was 2.05 miles, so apparently it's about the same distance as approaching from the west trailhead. However, I suspect the trail is much more difficult doing it the way we did. Approaching from the east is NOT a snowmobile trail, with at times narrow paths and several sharp elevation changes that a snowmobile could not easily traverse. The elevation was a bit up and down, minimum 688 (@ the falls) to maximum 977 (@ Trail Drive) elevation. My estimation is that the terrain if approaching from the east is 3 to 3.5, still very achievable but very exhausting. My guess is that if one approaches from the west from Klemix Road there is an easier snowmobile trail to follow. Either way one approaches the falls is well worth the trip!
I've attached a graphic of our route.