What size Engel cooler bait tank do yall like for keeping minnows and other live bait? I see a 7.5, 13, 19, and 30 quart capacity ones available. I usually don't get more than 4 dozen minnows for a trip so I'd imagine the smaller ones would be fine, however, I was thinking a larger size may also make a good icebox to throw fish in on days when I wasn't using live bait to keep my other coolers smelling a little better.

Also, anyone have any experience with Engel's Li-ion rechargeable aerators pumps? Not having to buy C or D batteries for my little Frabil pump would be pretty handy.