I have on some tours and not on others. It depends on how much hiking I expect to do and over what kind of terrain. If I expect to do some serious hiking, especially over slippery rock, I might take light trail runners. I have even gone so far as to buy trail runners when I stopped for a week of hiking and sightseeing in Yosemite. I would have mailed them home after Yosemite, but I was only 5 days from the end of the tour and didn't bother. There were a few places where when climbing for hours I kind of wished I had mailed them home.