Perhaps it was just the cloudless, scorching day - following 3 months of virtually incessant rain - but I think that Stratford-upon-Avon is one of the most attractive places that I have visited in a very long time.
Stopping off with a group of summer school students from the Canary Isles, on the way to Warwick Castle, I had just over an hour to take a rapid tour of the town centre; a walk along a short stretch of the the north bank, between Holy Trinity church and Bridge Foot, was just one of several highlights.
I didn't have time to inquire about the costs of the various means of being on the river, especially for groups, but the water certainly looked much calmer than in Oxford, which we had visited a couple of weeks earlier - not quite a raging torrent, but you would have needed good sea legs to stand upright, and we were quite rightly prevented from taking to the water.
Whether or not the narrowboat mooring is considered to be part of the River Avon, I don't know, but it adds another touch of character to this wonderful place. I can't wait to see it again.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC