They'll have 3 Fish (playboat) and 2 Mafias (Mafii? Mafi? They'll have two of the creekers); and one of each should be available to demo. They'll have the surfboard too.
If you have any specific questions about the boat, feel free to email me. I've had a chance to use it a few times (and I'm headed out the door to bash it down the local creek in a couple minutes here...).