Several (quite a few) decades ago my folks bought a couple of acres or so on the Neches Rives between Lakeview and Evedale. It was roughly a mile up the river from Weiss Bluff for those familiar with the area. Further up the river and across it was mostly land belonging to paper companies, meaning it was unoccupied and had basically no road access. We'd go in by boat as teenagers and hunt with shotguns and .22 rifles. My brother was out with some friends and encountered a sounder of hogs once. We, being essentially city boys (although we were Eagle Scouts and pretty comfortable in the woods), and not knowing about feral hogs just assumed they belonged to someone and never hunted them. But, they were clearly around that area north of Vidor back in the 60's & 70's.
You can never have too much ammo — unless you're swimming.