Before my first comp I spent some time googling and figuring out how to do my sink setup, then I realized, this is such a minor thing to worry about, we are talking about a few utensils!
Here was my gameplan for my first comp:
--3 bus basins from sams club.
--disposable cutting boards, no washing! Pair this with a stack of kwikcovers for the table and you always have a nice clean work area.
--three burner camp stove. I use that to heat water.
--extra tongs, knives, and other utensils and pots so I could wash less frequently.
--disposable pans
I actually calculated the amount of different things I would need to use a pot for and brought that many pots, so I didn't have to scrub a pot until after turn-ins.
Also, water, I brought 3 of those big water cooler bottles full of water to the comp with me. Saved me lots of trips to the water station.
Don't go crazy or spend a bunch of money on a wash setup. I did this, plus an extra tub for hand washing and a big bottle of hand sanitizer from sams and I was good to go.