Bring your curiosity and a good small flashlight. The room doors will be open days in advance. Walk in, say hi, take your time. ASK QUESTIONS! See it as a learning opportunity more than a buying opportunity. I suggest that you hold on buying until you have visited all of the rooms. Then go back for key buys. It is better to buy one $50. marble than ten, $5. marbles. IMO - the real value of a show is LEARNING. There is so much opportunity to learn because you have the glass IN HAND - not some pic on the Internet with variable lighting, color boosting and bad focus. Nothing compares to having the marble in hand.
Ask WHY it is from a certain manufacturer. Look at the glass, opacity, transparency, movement and color. Don't try to learn all manufacturers at once. Narrow it down to concentrate better and learn more. Good sellers will answer questions without spin, hype or impatience. Oh - and don't drop someone else's marble. That's bad juju. Develop a sense of who you are talking to - and who knows more and has more accurate info to share. Beware hype. Know when you are being hyped.
Some of the rooms will stay open quite late. Much to be learned late. Most of the show is 'over' behind the scenes before the show day begins.
Have fun!