Be careful if your using ratsak and the like Tony.
It makes the rats very thirsty, so don't have any water lying in the boat anywhere or the little buggers will crawl into the tight spaces looking for water and die there!
Bought the Brother-in-Laws Cruiser a couple of months ago ... had a little rat problem so he wired ratsak blocks inside the engine bay. Rats chewed out the wiper washer bottle to get to the water! One week after bringing the vehicle home and on a very hot day ..... woahh dead rat stink. Now I know why the Cruiser was always parked with the windows down when we took it for test drives!
Good luck Tony!