Remember, you can pull things from around your home.... or even your garden! Just use whatever you can to create a vibe in your booth that represents you and your business. For your backdrop... look around... have some fun with it!
The biggest tip we can give you is to remember NOT to block off the edge of your booth with a table... keep it open and inviting. Open it up... push the tables to the back or in the middle. Don't reinforce that "visual line" that shoppers seem to walk down deciding if they want to come into your booth. Add lots of visual interest with varying heights.... remember to use your vertical space!
Have an inspired and creative weekend!