We’re taking the RS tour in September. Should we expect hotels to have AC or no?
I have no experience with RS Tours. However, A/C in this country is very uncommon. Even some 5* hotels are not equipped with AC.
You shouldn’t need AC in September in Switzerland, but I bring a small personal fan for sleeping at night because I like moving air when sleeping. It’s very lightweight, portable and only $15 on Amazon — https://a.co/d/2dNWWOv
I took this tour in August 2019 and I don’t know how the hotels may have changed. I do remember that my top floor room in Luzern was quite stuffy until I turned on the provided room fan. It was bearable after that and the location/view made up for it. I don’t remember feeling uncomfortable anywhere else and our last hotel did have air conditioning.