Many exhibitors never realize the full potential of trade shows because they limit themselves to "portable" displays (ones that fit in cars or ship via FedEx). Although very nice presentations can be created from those products, the structural limitations can create a ceiling for those who wish to go to the next level of exhibiting.
"Non-portable" exhibits cost more to own, but higher trade show performance can more than make up for it, the same way a 20' space can often make you more money than a 10' space. If managing a "non-portable" exhibit worries you, there are many ExpoDealers that offer exhibit storage, shipping and management. You will actually spend less time by hiring someone to do it for you, and time is money.
To make a bigger impact, you have to think differently. Don't let your exhibit's portability limit your impact at shows.