My husband and I are visiting with my sister and her husband (they are both blind) and even though they live nearby they have never really been to the sights of downtown San Francisco. I was thinking of booking a tour with Dylan's Tours but was wondering if this would be OK with 2 blind people (and one guide dog)? I'm sure it will be a lot of on and off the bus which we could help them with, and they are used to being able to only hear about things without actually seeing them. Is this tour recommended? If not, what would you recommend instead?