That works well. If space is a problem, like it is in my shanty, I got one of those aerated rectangular boxes from Frabill that has a seal and latch. Never had any problems with leaks, I think I paid $30 for it 2 years ago. Aerator is built into the side, but can lift off to replace the battery.
I bought a small (prob 1 gallon) cheap minnow bucket for like 4 dollars at a bait store.It's only like 6 inches tall. It fits great in the bottom of a 5 gal bucket and then I can pile gear in on top of it. Or put fish underneath it. Saves space and any spills go in the 5 gal. But you do have to remember to take it with you or doesn't do any good. (Note to Andy)
I have a 1 gal plastic container from wal .... w a screw on wide lid 1.89 pop in a couple ice cubes .....I was using a plastic coffee can w a snap on lid ....and like you dth I had a similar deal had minnows floppin all inside my pick up....that was so funny reading what you had happen , almost like re living my own experience....
Hide your wife's car keys. Make her ride in the truck for a day. She will become sympathetic to your plight (or ban you from ever fishing again). Get a box of kittens(they are small enough to go under the seats). Cover them in tomato juice(works for skunks) set them loose in the truck for a day or two. They will find the missing minnows and smear tomato juice on the carpet to get rid of the smell. Don't forget to put the litter box in there or you will have a new smell. And for the record, I tried to prevent this by taking your quality bucket the week before. Good luck!!!!!