To many people this might seem like an odd question, but how will people see what you have to offer at your trade show stall if they aren't able to attend the show itself? You might think they have missed their chance, but thanks to the internet they can still be a target market for you.
All you need is a video camera and an internet connection and you can stream your trade show live to an online audience. There are pros and cons to this, of course, but if you prepare well and do everything professionally you might be able to significantly increase your brand exposure.
The main thing you need to think about is how you will be marketing your online stream to viewers. People are unlikely to watch it just to see how you and your team are doing, after all. Try to think about how you can benefit them, either by providing them with key information or simply by being entertaining!
It is a good idea to have a clear show planned, with a team member dedicated to staying on camera throughout the stream. If there are any periods of inactivity then viewers will leave and not return, so it is usually a good idea to go for a shorter show with plenty going on than an all-day one where not much happens.
A good idea for a show is to have a host going around the trade show and interviewing key industry figures. This usually ensures something is always going on, and you can check back at your own stall in between interviews to continue increasing your brand exposure.
Make sure to promote your show beforehand on social networks and through email marketing. You should put a good amount of work into this, as the success of the stream will very much depend on how many people are aware of it beforehand.
If you can manage all this, you might be surprised by how successful you become online. It will require plenty of hard work, but if you are dedicated enough you will see real benefits!