I purchased tickets on Groupon and need to know if I still have to book my tour or can we just show up at one of the times?

Yes you need to make a reservation

Make reservations

Book a tour on their website and they'll give you the option to pay with your groupon.

You have to make a reservation. Thats what we did.

How do I do this with groupon tickets? Thanks for your help

You still have to book with the company

The boat can fill up so you do need a reservation