V, I'll be at the Wheaton show around 11-11:30. Been going there for many years now. (since I've moved back to Wheaton in '91)
To answer your questions:
1) The dealers there won't let you touch any firearm, ammo, reloading supplies, parts, or anything even remotely connected to firearms without you first showing a FOID card. I just clip mine to my jacket, pocket or collar so everyone can see it.
2) Deals ? Depends on what you're looking for. So yes and no. There's a guy there selling powder and other reloading supplies that's much cheaper then the Gander Mountain out in Geneva on pretty much everything. You won't see much any "Beany Baby" type tables. They also keep the neo-Nazi stuff out. There's a couple of tables that have real WWII bring backs, but they also have WWI, WWII, and other era American, British, French and Japanese stuff also.
3) There's a show out at the Kane County Fairgrounds the following Sunday. They generally have many more vendors. Also only $5 to get in.
4) I'll be the mustached guy in the faded blue "8th Infantry Division" ball cap wearing a Blue Jacket that says "TH Ryan Cartage Company" with my 7 year old son in tow. Come up and say "Hi", my name is embroidred on the jacket.