I usually hunt them going to or coming from bed to food or food to bed. They tend to use the same trails in a broad sort of way, it may just be a patch of forest they are familiar with. Were I hunt the food sources are numerous, hard to say which they will choose. A few small scattered piles of Corn on there normal paths may help them stop and feed a little, otherwise they may be there and gone pretty quickly.
Scent or noise will spook them, noise seems to be a slightly higher factor. Unless they are on the move in leaves or brush, they make a lot of noise themselves and it masks your noise. If they are moving slow through the grass it really doesn't take to much noise to spook them. A rifle lightly taping a branch can do it within a hundred yards.
I usually shoot 100-150 pounders.
The big ones are smart, the juveniles not so much. The large ones may lead the sounder on a round about way, the juveniles often split from the sounder and cut corners, not nearly so cautious.
And in addition to making sure they are dead, dead, dead, watch your rear. On more than a few occasions the lead Sow has doubled back to check on a sounder member, they may turn it into a confrontation. Doesn't happen often but it happens.
The Deer often tip me off that the sounder is coming. If a Deer panics and bolts, it my be your scent or it may be the sounder breaking brush off in the distance.
A hogs vitals are lower than you'd think.
The only way I've ever gotten close enough for a bow shot was in the dark. I've never tried a bow, but have gotten pretty close moving real slow and quiet at night.
A full grown single Hog is usually a Boar or the Boars trail the sounder. Juvenile Boars are mixed in with the sounder until they get a year or so old. IMO Sows are better eating.