Haven't heard of pit traps but that sounds interesting. We use the 16 ft. stock panels staked into as large of a corral as you can afford with theminimum being three. Then a drop door at the entrance with thetrigger being far back in the trap to get as many hogs possible trapped at one time. Usually one or two catches and the remaining ones will not enter for months, especially the smaller traps. They will eat bait all around the trap and up to the entrance but will not enter even for the most delectable bait. They are uncanny!