Pesky,
You will find that since Michigan has abundant food and water sources as well as cover what is good on one area of 100 acres, might be just as good right next door. Some areas hogs inhabit they are forced to water and it is limited like where I now exist. However, you hit an area of flooded bottomland and those hogs can literally go anywhere for water, which generally speaking is their number one limiting factor. Food is necessary yes, and cover, but if they don't have water things get tight in a hurry right around a water source. Out here we have used that to our advantage and folks continue to do so in the arid southwest and in other countries like Australia that have similar semi-arid lands where many of the hog populations exist.
If you get serious about feral hogs you ultimately need to know how to do everything from box trapping, to corral trapping, spot and stalk, baited hunting (if legal) and a variety of other methods. While thermal optics and scopes are lovely, unless you have a govt. credential, strapping a true thermal scope on your rifle isn't something the rest of society is able to do. Let alone the investment.
Recently myself and another individual gave some thoughts on box traps versus corral traps. Boxes are obviously more transportable, but you can catch the whole "sounder" (family group) if you set corrals in one whack.
I always married my traps with trail cameras, even the poorest quality trail cam will tell you how often they are coming to your bait, how many and how comfortable. Rod and his folks came up with some remote triggered doors which I think are slick, however you can also use your camera with a feeder on a timer and when you see every hog is in every time they come, set your door to fire and voila!
To each his own on invasives like feral hogs, but I can say having trapped them in OR/NM/TX that corrals really shine if you've got the money and time and the hogs are fairly established.
If they are being run around by hunters, all bets are off, out here often dog hunters will convince a rancher that they can get all the hogs, the result most often was 25 hogs on camera ended up 1 hog in their truck maybe 2 at the end of the night and the other 23 went up the valley for the week and returned when the pressure left.
Wife and I have a feral hog website that provides info on impacts, need to start writing about the on the ground aspects again, but haven't found the time.
Can check it out here...
http://rdferalhog.com/Justin