Need to remove that plug after every trip to drain any water left in the
bilge. Leave it out if left outside, even if covered, since if you have a
leak in your cover, or if it collapses, it will be able to drain. Letting
even a little water sit in the bilge for days at a time will create big
problems down the road.

Pre-launch, make it a habit to install the plug when you remove the rear
tiedowns. Remove the plug when you fasten the tiedowns after loading the
boat onto the trailer.