A .30-30 with 170 grain bullets will do it, but given a choice I'd take your '06. If the shots are not too far and you shoot the .30-30 with confidence you should be fine.

Hog hunting is fun. Hogs are smart as all get out. My guess is that if their eyesight was as good as a deer's, we wouldn't kill nearly so many. Their sense of smell is phenomenal, their hearing is pretty good, but they ought to ask for a refund on their eyesight. If they even think you're in the area they will take off running, and they'll run for miles. I've seen them learn to watch the cattle. If the cattle start acting funny, they take off.

Good luck, and let us know how you do!