I did it, it was fun, and it was pretty profitable. However, it depends on what is "worth it" to you - if you add up expenses (coming up from SoCal) and time you'd have to sell a ... unless you were combining it with store visits, etc. and doing a multipurpose trip.
It was well-organized and the woman who runs it has a great eye.
It's hard to say how "worth it" a lot of these shows are as contacts made, etc. can really bear fruit down the line.
Feel free to email me off-board, too.