Jacks,
Before the depression I did a lot of boat work and one of my favorite tricks and it works for most materials, but is best on fiberglass and wood is to get some thin epoxy (not JB weld) and disposable ear plugs (new). Use gloves and soak the plugs in epoxy and then squeeze then just enough to get them into the holes. Leave some protruding that you can trim off to have a flat surface. Screws will often go in without a pilot hole, but if you have trouble, drill one.
I actually like Lou's idea best, but that may be really difficult to do.
Matt