I like to secure the drain plug for my trailer boat near the drain hole itself with a section of coated wire leader secured to the outboard motor bracket. This way I never lose the plug, and when I do a walk around before hitting the road, it reminds me to put in the plug if I have not done so already. If I happen to forget and launch the boat without the plug (which happened to me once), I can reach over the transom, grab the plug, and insert it. That’s better than racing about trying to locate the plug while the boat rapidly takes on water.
Secure the Drain Plug Near Drain Hole on Your Boat
Use a tether of wire to keep track of your drain plug.