You will seldom get a design that is better than your brief. Invest time in defining your design brief.
Put in the physical requirements clearly;
The amount of space you need in your pantry?
The number of meeting rooms you need and how many people will be there in each meeting room?
Do you need a dedicated space for catering?
Do you need any engagement or interactive ideas at the booth?
What is the ballpark budget for booth building at the show?
Put in the conceptual requirements as well;
What is the objective of participating at this show?
Is there any theme that you and your marketing team have decided for this show?
What have your trade show booths looked like in the past years, what did you like from the past and what you would like to improve in the future?
If you can, then go a step ahead to make a complete mood-board of design references, product displays, information counters, etc. that you like. A visual representation would go a long way in communicating to a designer the kind of design language you like.