The .30-30, by all means
First, the ammunition readily available for the .30-30 is uniformly pretty good, either in 150 or 170. If the hogs normally go much over 100 pounds, I'd steer clear of the 125 gr. hollow point load. That is essentially a varmint/small deer load, and wild hogs have a lot of thick, coarse hair and really thick hide, plus they frequently have a lot of dried mud in that hair. All this combines, and a too-light bullet may (some say PROBABLY will) result in too-shallow expansion and insufficient penetration.
Most 7.62x39 mm ammo is loaded with lighter bullets, in the 123 gr. range. The imported ammo, even the soft point and hollow point, has a poor reputation for terminal bullet performance. The 154 gr. load SOUNDS good, but I have no first hand knowledge of it, and I understand it can be difficult to locate.
Pretty much all the .30-30 bolt guns are pretty accurate, and with decent sights, a good shooter can place the bullets with some precision. While a good military carbine, the reputation of the SKS for sheer accuracy is not good. While exceptions occur, typical groups run toward four inches at 100 yards. The rapidity of semiautomatic fire and quick reloading are not valid substitutes for even average level marksmanship, and do not apply in a sporting hunt.
As to the best way to hunt hogs in your area, I'm sorry that I have no idea of the type terrain you'll see or the resources avilable to you. Hopefully, other members will provide some knowledgeable input.
Very best of luck on your hunt.
Johnny