Unless you wish to bring your own furniture which can look shabby and risks getting damaged, it is customary to hire furniture for the duration of the event. The exhibitor manual will have full details of packages arranged by the organiser. There are a number of companies who hire furniture many with extensive stock.
Remember the nearer you leave it to show opening the smaller choice you will find. Some organisers also provide furniture packages as part of their shell scheme costs – if in doubt speak to them and verify your options. Remember chairs and tables are only a small part of the picture – you may need literature racks, storage with lockable sections as well as more mundane items like waste paper bins and coat racks.