I'm heading down to Zion this weekend and I'm planning on doing Birch Hollow with a group of 4. Me (fairly experienced) and three others (all familiar with ropes and rappelling but no canyon experience to speak of). I'm wondering what special challenges will be encountered or if this will be fairly straightforward. I'm also hearing that the longest rap is 110, is that true?. I have a 200' sterling C-IV rope. Do I need to count on using a pull cord for this rap? Any pertinent info you have would be great. I'm comfortable dealing with any of these challenges on my own but it's the lack of experience in my group that prompt's me to ask for advice.
Thanks.