From what I have observed, both Amateur Radio operators and Gun owners to some degree are all Preppers.
Does that mean every radio operator or gun owner has a years supply of food and 5000 rounds of ammo for every gun, no.
What it does mean is that to a large degree, the two are a part of being prepared. Most Hams know if there is a disaster or emergency that they may not be able to get food, water and other necessities for a couple weeks, sometimes longer.
Both groups also know that in any major disaster, for the first several days to two weeks, they are on their own as to self protection.
Not every Ham thinks of these things. Some just enjoy chasing DX or like the technical part of radio, but as a whole, most of us would qualify as a "Prepper" on some level.
Seems whenever our group gets together, radio and guns are discussed. Not by all, but by the majority. And no, it's anything but anti gun talk.
I like the idea of ham gear at a gun show. Unlike what some have portrayed, the majority of people at a gun show are not off the deep end. Yes, you will see some, but you have extremists in any area of society.
Most are looking for a gun part to finish a project or a good deal on a firearm. Not much different than the ham looking for parts or a piece of radio gear. Many times it's looking for an old piece of gear that takes them back to other or better times. Much like the guy looking to find a copy of the first gun he ever owned.
We have hams who are extreme also.
John