My hiking group is going to Zion Park next September. We are considering hiking The Narrows. I don't think all in my group can hike it in a day and not all are backpackers. Can we do half of it as a day hike? I guess we could start at the bottom and go up and back but I'd rather shuttle about a 7 or 8 mile section. Is there access to the middle part of that hike?