I'll be setting up with beginner books at the Minn. show. Which is most of what I do with gun shows here in Des Moines and that is to introduce Nihonto. You'll find most of the movers and shakers at Chicago and ill try to make it if I have my koto blade back from polish and NBTHK shinsa.
I did one show with Larry and Chris a few years back and I have to say its much more relaxed much like the ol San Antonio show which I wish would start back up even if bi annually, Chicago is all the Old Guard who sometimes can come across a bit aloft until you get to know them, and have bought off them.
Papers id stay with NBTHK it seems to get more bang for your buck. If you just want to know if the mei is good or what you have if mumei...do them all and see if who, what, when, all come out the same. A few years ago when I made the circuit I always got a kick of taking a unknown sword around to each table to see what the thought was to W,W,W. Usually ten tables ten different opinions. Kind like the Movie Let it Ride with Richard Dryfuss question" which horse do you like?" get a answer mark it off the program and bet on the one left that did not get picked.
Sorry not all the Why's answered but I got off on a ramble. One other thing Andy Q is worth your admission to the Chris and Larry show but then he'll be in Chi town too I suppose.