I have some thoughts on what I'd like to see in an article aimed at fur trappers.
1. Trap types; They're not all boxes.
Especially beaver traps.
What are the advantages, and best uses of each type (door types, spring drop/latch, swing/washer-lock, guillotine, clamshell, etc.)
And what preparations these traps might need, like dip or paint.
2. Set selection and construction; How and why.
How much building of a "set" do you do for various targets? Raccoons don't care about wire, but 'cats and definitely coyotes do.
Staking or bedding of the cage.
What's the difference between a good spot and a bad one?
3. Lures and baits; What to put in there?
Bait baskets, lure hangers and scent trails, pocketed bait, etc.
4. Capture and dispatch; Now what?
Okay so I got a 58 pound beaver, in a 58 pound trap, now what? What about a mink in a well built cubby, with a staked down 'cat cage?
5. Resetting, replacement, and repositioning; What next?
After the catch and dispatch/transfer what steps are taken to remake the set?
At what point is a cage "fouled", and needs a new trap in it's place?
And when is a location "played out", and it's time to move?
How far do you move, for what reasons? Musk, mud, catch rate, or whatever... What are good reasons to stay put?
6. Cost effectiveness; $500 a dozen, holy cow?
How many cages does it take?
Where is a fur trapper's attention best focussed, both at the beginning of a line, and as the equipment pays for itself?
How do you keep all that money in your own pocket?
Theft, wear and tear, and time are all working against you.