Can you take the boat ride up the river apart from the main ticket?

I'm afraid I can't advise you on that I would like to know myself I've just going down there to enjoy the ambience of the whole place and had various lunches at the Steak Loft and I think it's a cool BJ's right by the bridge you have to go now or I'll call the Chamber of Commerce still be able to tell you good luck

I think it's a separate ticket.

Short water taxi is free from one end to the other

You have to purchase an entrance ticket. Then there is a booth at the waterfront to purchase the any of the boat rides.

Call and ask

Not sure. Best to call and ask them.