All of my group wants to do Orderville at the end of September but some have never been in a canyon while others have experience and want a bit more of a challenge. I was considering splitting the group and having the more adventurous drop into Orderville through Birch Hollow and hopefully meet the others hiking down from the top. Was wondering what kind of lead time the Birch Hollow group would need to get to the bottom about when the other group hit that spot? I was thinking we would need to start about an hour before the other group but that's just a guess. Was figuring it would take them 2-1/2 hours from the Birch Hollow drop off point on the road to get to the entrance to Orderville then down to where Birch enters the canyon. That should give us 3-1/2 hours to complete Birch assuming that's the standard time? Has anyone done something like this or could give me some approximate times? Thanks!