Where do I buy tickets?

I'm not going to be drowned, at least not today.

His fishing expedition is happening but it will be a boys-only event. Which is fine by me. The spot they'll be heading for is so remote the Land Rover won't be able to take them there: they're going by bicycle. That's two fat men and their tackle and their fishing tackle on bicycles at dusk on a narrow rutted river bank track.

I don't care what kind of seat I get, where do I buy a ticket?