While still on the boat put them, alive, in a plastic bag with a few Tablespoons of salt, (for 3 dozen or so), and keep them on ice or they'll start to rot. Pop them into the freezer ASAP and be sure to tell the Mrs. not to throw them out. Or, when your wife is away, put them on a cookie sheet, sprinkled with salt and put into the freezer. When they're froze solid put them in a plastic bag but don't tell the Mrs. that you used her cookie sheet. Keep them on ice and if they thaw out on board do not try to re-freeze them, they'll become mushy and start to stink. In fact some will tell you that if you put a stinky minnow on your hook the fish can smell it, even after you remove that minnow and put on a fresh one!
The odor lingers.