Old Bill has clearly not gotten much attention over the years, but my goodness is it a good canyon! At least it is for those who love a good downclimbing challenge. Here is video of our group having a good ol' time in it. The beta suggest anywhere from nine to 24 rappels. I did 11 and have no clue how people could take it under 10. I could maybe see 10 with hindsight of what we did.
https://www.youtube.com/watch?v=2c6B...4oqg1CwSPL0ACg