(may not be the right place for this but ...)

Y'all ever built hog traps using boards ?

We had several on a previous lease I was on that were built from green lumber nailed to fence posts and trees and built in a square or a rectangle with a swing-down door that was tripped with a trigger on the far side of the pen where we scattered corn.
We used to get several hogs at once and they weren't all that expensive to build.
Could have used treated (or even untreated) 2 X's but we always had access to green hardwood at the time from a tie-mill so used that.
When no one had time to run them we would just tie the door in the up position and keep feeding when we were in the area.
Kept the hogs coming around and got them used to going in and out of them at will.
Then when we wanted to fool with them we would set the trigger and get a bunch of hogs to pick from.

If it works sounds great and its cheap

Built right they work like a charm.
Have to be built real stout though, a big hog can tear some stuff up.
Cheap depends on your lumber resources.
In our case several of the folks worked in the wood products industry and were around mills enough to get "junk" lumber for little or nothing.

It was a river bottom lease in east Texas and we had becoup hogs there.
It wasn't anything to have 5 or 6 at a time in the trap, sometimes more.
Pick which one (or more) looked good and pop it and turn what you didn't want back loose.
Didn't seem to hurt the numbers and there was always willing pigs the next time we would set it.

theres no such thing as hurting the number of hogs!! lol. sounds like your traps work good, if i had cheap acess to lumber i might do the same.