Whistle. which actually required by law in Oregon. I have it on a lanyard around my neck along with my keys.

Boaters flare gun. to shoot at the assholes that keep fishing while someone is in trouble.

Cell phone in a ziplock. it does not have to be activated to call 911. I have an old one that works everywhere.

I have a dry bag with towels, sweats for 3 people and an instant fire:
matches, newspaper and a wad of kindling.
If I go over, the drybag is what I will grab for. I carry enough for the average DB boat party in case I come upon a wet crowd in the winter.


Sticking your clothes in a vacuum packer will make them amazing small.