Im no expert on canal type business Jane so what I say is just an idea as I know how it can feel when a plan just dos'nt quiet come together despite ticking all the boxes in your head talking to loads of people but then unexpected ones just pop up with their seemingly unreasonable objections!
I would say steer well clear of visitor moorings though.
As for someone asking where do all these visitors park when they turn up?
I would dare say probably where they park when they come and walk their dog every day or when they come for their jog,walk ect!
Would it not be possible to do a rolling trade where folks could step on and off.
Although I know you are not supposed to stop and cause congestion you could for example just be stopping to pick someone up.
People like boat trips why not have a latte and go for a spin?
In every town there seems to be loads if not too many takeaways but they all seem to be there.
I remember a late train which had a little band on it and everyone would get on and bring a drink.
Perhaps you could advertise a similar thing where you are doing a trip but stopping along the way picking folks up dropping them off ect but in the process getting passing custom.
But just remember the peace that people have come onto the canals for in the 1st place.
I think getting it right and blending in is also very important,
Whatever you decide to do good luck.
I always seem to fancy a cup of tea when we go walking down canal never anywhere to get one though.