During cooler weather I let 'em swim around in a large cooler. That way it's easy to cull fish if/when necessary. And...if the catch turns out skinny it's easy to release the few you have. During hot weather I keep froze gatorade bottles in the freezer in my barn and line the bottom of the cooler with 'em (that's about 4" of ice in the bottom of the cooler). I just toss 'em in and close the lid. The fish are nice and cool when I get 'em back out of the cooler to clean 'em when I get home. Those froze bottles keep me from making additional stops getting to the lake and all I have to do when I get home is rinse them off and back in the freezer they go.