I used a brass piano hinge to fasten the lid to the barrel. I then took some scrap metal and made a "Flap" that overhangs from the flap to the barrell..this way the flap doesn't fall inside. Like Saltheart said, I use a small dip net to get the rascalls out of the livewell...then transfer water from the tank (utilizing the large vacate valve) to a 5 gal pail, then the fishies then run like the wind to get them in the water!
Gotta hide the aeration control valve, however...someone stole mine off my tank last year. Thems the breaks
I use 4 straps with the cinch buckle to lash the tank to my rack on the back of my truck. It works well and is real stable. On my rack, I wired 3 cigarette lighter plugs up. Just throw the deep cycle trolling battery in the truck, wire up the rack and plug the aerator into the rack. Nice and easy............actually, easier to show than to tell you about it.
Hope this helps!