Last year was my first time to AX, and I brought 
about eight cels(many of them pretty expensive). 
I found that it was all cool and I had fun 
sharing with the other collectors. I did see some 
sales and trades happen and there were a few 
dealers there as well. What hapens is that there 
is a specially scheduled cel metting for just 
this activity. So you get to meet a lot fo the 
folks from the forum and put a face to the name. 
But, if you don't feel comfortable bringing cels 
to a strange place, then don't. It's all about 
having fun.