I trapped a lot in high school. Seems they come in waves. Catch them a while and then not for a while unless there's a random, single pig trapped.
Which reminds me…I still have a trap. Loaned it to a buddy 15-17 years ago. I heard it was bent with a tractor while moving it. Guess I should text him and ask if he's ready for me to come get it lol
Bull tripped it. I've had luck putting a stick between a rung on the top panel and the door. The hog/s go in, bump the door and get trapped. Don't have to mess with a trip wire and have had decent success.