I want to make a rideable boat

So I want to make a boat that can move around and a player can walk around on but I'm not sure how to do it.

How taxing would it be to make a new tree collision every time the boat moves?

Or maybe I should piece together box bodies?

I'm pretty much just using ogrenewt for collision detection so no forces or anything would be applied.

I guess I misunderstood how tree collisions worked, I thought you couldn't move them after they were made, but I guess you just can't apply forces to them.

Since I'm moving the tree collisions(boats) around by using setPositionOrientation I think I can make boats players can ride.

Well, no, when you move collision tree manually, it will brake the collision detection and objects will start to penetrate and act otherwise in a non-realistic way.