Mike:
Since you are being so kind as to donate your product to the Moyer Tourney, the least I could do is spend a couple hours of my time toward this...Images and my take on the design below:
Since you guys work with metal and are most likely going to make other items other than gaffs in the future my idea was a cool looking fish logo that could be used as a base. Fonts and type content can easily be changed around. I know you were asking for skull and "gaff" bones but I think that has been "played out" and a simple design will lean toward a cleaner more professional appearance. They will also allow for flexibility in printing, engraving and using the same logo for other items.
Thanks,
Steve