Thanks for all the help. I ended up purchasing two sets of these:
https://www.amazon.com/dp/B01BD5ICNW/?tag=wranglerorg-20 and mounted them on the bar I have which runs from the roll bar to the windshield. It only cost me $64 and ended up looking like the setup above. I use gun locks like those previously shown in a photo in this thread to lock the firearms (through the trigger guard) to the roll bar for anti-theft measures.
Not worried about traveling with the firearms "cold" as I always carry a sidearm while hunting and as well as to and from the farm- there are coyotes and bears there and I've run across both in the woods. I haven't had to use a weapon on them before, but in case I did, a scoped bolt action rifle would be useless on a predator charging you from 20 yards.