I am waitlisted on a couple of tours and I have read the Covid conditions that every tour group member must sign. But...what if during a tour the country goes on lockdown? Or what if days before a tour starts, the country imposes a quarantine for all international arrivals and that time would eat into tour time?
Why not write to the RS tour department and ask? Only they can give you the definitive answer.
Only you can determine how comfortable you are with the risk of unforeseen circumstances. What is comfortable for another person may not be comfortable for you.
I have every confidence in RS Tours being able to manage the unexpected in a professional manner. These are amazing professionals that have been managing tours to Europe for years. I know we all agree that Covid and travel restrictions are a new factor, but I think they will be able to manage these as well.