The very best checklist you can have is the one you make on your own.
Do a test cook just like you would at the comp in your backyard (complete with 'on time' turn-ins). Have somebody watch and make a list of EVERYTHING that you used to do that 'competition'. Everything from tables w/ leg extensions, to sauces, rubs, injections, to spoons, knives, a basting brush, to a roll of paper towels, right down to the meat itself. EVERYTHING.
Then figure out sleeping arrangements (assuming it's an overnighter). You'd be amazed at how just having your favorite pillow makes a very big difference in the quality of rest. Add ALL of these things to your list.
Then when you start packing for your comp, follow your list like a crazy person. Check off each item when it is ACTUALLY packed. Really a sick feeling realizing you left something at home, look at your list, and sure enough, it's not checked off. I still print out and check off every item on my list and I've been competing for almost 5 years now.
I even still do a printed out cooking timeline. It's my best friend when I get behind or something goes wrong and I need to get back on track.
Russ