Where ya huntin', Krusty and is there much hunting pressure on them piggies?
It don't take much pressure to make 'em go noctural. A little more pressure and they'll head for greener pastures! That pack will be replaced, in time, with a new bunch.
Most states have permits available to hunt at night with lights. Even better if somebody along knows the territory.
Things to remember about ferals:

They're tough, but they AIN'T bulletproof! A .30-30 class weapon does quite well.
DO NOT corner one bare handed! He'll win every time!
They're easiest hunted with a pack of dogs! (best be tough dawgs, too!)
If you're fortunate enough to kill a sow with piglets, sit down and wait. They'll come back to momma and they are the best eatin'!
Best I ever had field dressed 3#'s! I REALLY like those in the 10/15# class.
Good luck and kill 'em all!

Krusty

Late (almost dark) afternoons and early mornings (butt crack of dawn) will be best for stand/still hunting.
Tip:
Up in the heat of the day, they'll be laid up in dense thickets/brush, especially if there is water nearby. It's a really good time to slip into the cover from downwind! You can smell 'em way before you see 'em! You'll need a semi auto/lever in a low recoil round (.30-30 is superb!) and iron sights. When you "bust" 'em out of cover, it's like a porcine quail shoot! ...and it'll be over quik! BUT! Talk about a RUSH!
My "pig" rifle is a Ruger Ranch in 6.8mm Rem SPC.
Beware! Pigs "is" spookier than any whitetail ever hoped to be! LOL!

The afternoon & early evening has always been best for me when hunting pigs.