[Topless]

Sadly it sounds like some tour leaders suffered from a bit of irrational exuberance. Bad form. I have been on a handful of PCA tours and they were all run at legal highway speeds and the group was kept together pretty well. The best tour was one where cars were split into smaller groups of 5-6 cars with one leader in each who knew the way. We met up again at several spots along the route for a little local history or in-depth knowledge of the area. This was much easier to manage than trying to keep 50 cars all together. Don't give up on them after one bad experience.