as none of the people in my group drank, it never came up. I would ask the company.
I don't recall if that question ever came up. I'm going to guess and say that alcohol isn't allowed on the tour bus, but you could certainly ask.
I didn't -- and no one on our trip did either. I'm inclined to doubt that it would be allowed but I would ask...
We did not bring any alcohol on the trip with us and I don’t recall our guide mentioning anything about it