I've never been on a RS tour (or any group tour, for that matter) but I had to jump in with my comment about sightseeing with Europeans.
Rule #1 - Do not believe anything a European says about how long it takes to walk somewhere.
In one example, we rented an Airbnb in Amboise, France and the host told us it was an "short, easy" walk from the train station. It turned out to be a mile and half of which the last half mile was straight uphill. (AND we had our luggage AND it was pouring down rain. We were not happy campers.)
In another example I arrived at the train station in Nice (again with all my luggage) and approached a taxi. When I gave the driver the address of my hotel, he said, "But Madame, this is very close you can walk there!" He pointed at a street and told me to go until I saw a certain landmark, then turn and go to another landmark and so on ("It is not far, Madame!") I walked for FORTY FIVE MINUTES dragging my luggage behind me. The hotel was more than two miles away which is "not very far" by European standards.
Rule #2 - Make sure your Uber app is updated and ready to go when traveling with a European
Twice I've traveled with a French person and both times they walked me into the ground. With one of them we were touring London and many of the Underground stations were closed that weekend for some kind of maintenance so we walked. And walked. And walked. And walked. (Oh, and of course it was raining, right?) We walked 12 miles that day - not 12,000 steps but TWELVE MILES. We finally got back to the hotel, me with blisters, limping in my soggy boots and I said I was going to call an Uber to take us to dinner. "No, we do not need an Oo-Bear," he insisted. "It is only 2.5 kilometers to the restaurant, we can walk!"
Another time I was touring Montreal with a French friend and we walked 10+ miles in below freezing weather in March. Finally, at 7:00 pm, I convinced her to stop for dinner ("Tu as faim?" she asked me in astonishment. "OUI, j'ai une faim de loup!") When we finished dinner it was darker and colder so I said I'd call an Uber to return to our hotel and she looked at me horrified, "Why do you call an Oo-Bear? We can walk to our room in only 30 minutes!"
Both times I called the "Oo-Bear" and both times they sighed, rolled their eyes (les américains sont tellement paresseux, n'est-ce pas?) and got in the car.