The boat holds up to 6 people and is a per hour price. I think it was 160 for an hour, less per hour if you get boat for more hours.
To expand a little on Nick's answer, there's usually a Groupon that saves you some dollars for two or more. That's what I've used multiple times.
Tickets are $26.99 for adults 13 years old and older $15.99 plus tax for children 4-12 years old and children 3 years old and under are free. Reservations can be booked online, over the phone during business hours or at the ticket booth
Adults are $29.99. Children are $16.99 each. If you're staying in a nearby hotel, the concierge can probably get you $5 off per person.
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