We are doing the bus tour which can drop you off and one can walk the 2 miles and meet up with the bus or stay on the bus and just go to the other end. I have mobility issues (twisted hips and herniated disc) but i want to walk the 2 miles. I will push myself. The biggest issue i have right now that gives me anxiety attacks is worrying about being too close to the edge on that trail. If you have gone to the south rim either by tour or car have you done the walk from mather point to yavapai point? Is there a railing? Is it a narrow path that only one person would fit? I am stressing about this way more than i should be. I really want to do it and i know hundreds of thousands do it a year but i am terrified. Not a fan of heights, but even less of a fan of situations that i can not control.