I have never seen a pig on the Pecos. Lot of sign. Lot of mesquite cover.
They are there, but they are not seen. Some of the farmers might have a clue. They are nocturnal.
Better than that, there are elk on the Pecos. Again nocturnal. Feed on the crops at night.
If you know a farmer on the river, you might have a chance to hunt them.
I have heard of a guy shooting a pig on the river, but have never seen a dead pig.
I live in Roswell.
I have seen pigs from the road east of Carlsbad close to the Texas border.
Lots of country, would be hard to hunt without local help.