Find a local Lobster caterer, or the guys who overnight lobsters. Need
lobsters on your galley table shots, Local seaside restaurants will
give free meals to have the dock & restaurant featured in your book.
Get you a free Liferaft for an Important chapter in the book. Don't pay
cost for anything! Tell them the competitior is sending one free and
they need to as well, that your going to pick them anyway, because you
like there features ;0). Provide them with a list of your sponsers,
make them begg to be published.

It's all in the way you approach them.

Joe