Buy Randy Pryor's book "Road Warriors." It contains a wealth of information by many of us who have gone down the same road you're about to start traveling.
Doug Dyment has an award-winning website that covers this topic extensively. See http://www.onebag.com/
Doug has saved me a lot of grief over the years. His site is worth more than a quick read. It's worth studying.
Forget about ANYTHING flamable on the plane, either in your carry-on or in checked baggage. That includes flash paper which, if old enough, can spontaneously combust.
If you try and take such items on the plane you will find a number of completely non-humorous security people inviting you to stay around for awhile.
High quality clothes resist wrinkles. My Oxxford tuxes come out of the bag looking like they were just pressed. Absent the high-end clothes, buy a travel steamer. You'll find a great list of resources at Doug's website.
You don't say how long the trade show will be and how much work you're going to be doing, so it's difficult to determine how much you'll need for the gig. A suit is good, but so is a sport coat that goes with different trousers. A Navy blazer is a requirement. Don't forget quality ties...Brioni is a good brand.
You can also ship additional clothes and such ahead of time which lessens the possibility that you'll be stuck if your bags are lost. Tipping the Sky Cap when you check in is also a good idea.
When I flew I always took my irreplaceable items with me on the plane in a briefcase. I never had a problem.