Hi all, I just use a rectangular plastic tub. Light, holds stuff, large enough for pots & pans. Can wash hair in it, take a sink bath if required. Keeps my counter clear, can be used on counter or picnic table.
That's what we did, used a 12 inch SS mixing bowl. It works GREAT and I made it so I could lift it out and get to the storage under it. If it ever stops raining I will take a pic of it for you. We age getting SNOW in MAY Ugh!!!
For the "big rig" I have a fish-cleaning table with built-in faucet that connect to the outdoor shower (or directly to the water pedestal) and drains to a bucket.