Good stuff! For being so overpopulated it sure is hard to get permission to hunt them though.......02
Once you get in, if you get in, the most important thing is respect. You have to respect the farmers, land and everything on it. Ask if you can help them on the farm. I've helped fix irrigation systems, picked roots up out of a new field, Got a lawnmower back running, clean culvert pipes and spillways, cut trees out of the roads, ect. You get the point. It's not always about killing pigs for them. They need to see some of your character first, after all, they have more money invested in cows and equipment than any pig damage can compare. Not to mention the majority of them insure their crops.
They dont want a bunch of wild heathens comin on their property shootin up irrigation pipes, equipment or livestock just to take a few porkers out.
Also, a lot of them contract pig eradication. They don't always know when those guys will be there. For example, I seen a pack of 30 just on the other side of the fence from the property I hunt. There wasn't a darn thing I could do but watch em in hopes of them comin over to me as the farmer next door had already paid a contractor to keep an eye on his property via drone. I told the farmers that I hunt for, They will tell their neighbor and I may get the go ahead to take em out next time I'm down or I may not.