For storing the plugs try this:
Get a 6 inch piece of aluminum angle, drill three holes in it the same size as the drain hole plug on one edge and 2 3/8 inch holes on the other edge. Bolt it to seat box and store the plugs there, with a spare one as well. Always in sight to make sure they are there and you have a spare one in case you lose one. Bead blast it for a nicer look.
Was with some guys and we smoked an ignition switch one night, but the engine was still running, then took in lots of water playing. Entire electrical system, including bilge wasn't working, but plugs were accessable and we beached her and drained it then went home. He killed it at the trailer and she wouldn't start. Started me installing the in the outside.
Use the screw plugs versus the T-handle plugs, never have lost one.