My shop is a 1/4 mile down the road, so I will certainly be there. I know a BUNCH of people in Slidell (inc Dustin, he used to work for you) and can certainly do my best to get attendance up. I would like to see a good selection of parts, accesories and used guns/stuff as well as the new gear. A knife sharpener guy is always good, and maybe someone who can install sights on handguns, simple smithing, etc while you wait.
Honey Island Range shows up to some of the gun shows. Maybe Slidell Army Surplus? Also, Massey's just expanded to a new store, might like the exposure.
Jdindadell, +1 on the knife sharpener and simple gunsmithing.
A good selection of holsters and nylon/kydex would be nice, maybe for guns other than glock?
Good food good. Maybe a bs.com rec area to hang out and eat together?
Make sure you advertise clearly, the usual Slidell gun show is at the Northshore Harbor Center a couple times each year, lots of people will just assume.
Hopefully I will have a little something set up and I will be getting a booth for the steel targets I have. I'm working on a stand and bracket which is what is the determining factor. If not I will be there to show support as a patron.