As others have written, the group dynamic can be a challenge. Luck does play a role. However, our TA group started with four, picked up four along the way, with a few diverting to other routes or time schedules. The keys for us were independence and flexibility. We would pick our destination for the day and travel to at our own pace. In some cases, an individual would go farther or shorter. He would try to let us know (cell phone or message left at likely stopping points.) Rejoin was the usual outcome. Meals were at individual discretion. We did have a number of group meals, however, with each contributing. One very important factor was aid, if necessary. I was injured about 2/3 of the way. My group traveled off-route to help me, taking care of getting my gear shipped, securing meds, arranging accommodations, and my flight home. They were terrific. They turned an emotional crush into a wonderful memory of their friendship. I still correspond with a number of them years later.