maybe you caught them all with them catahoulas...I have had places in the past that the hogs were only in that spot at certain times of the year...like when the pecans or acorns were on the ground.
during droughts they concentrate close to water but when it rains and water becomes plentiful they will range out.

Right now it feels like im hunting Catahoulas... cant get on a hog to save my life...

Some of these places held hogs year round.. They may move to a different part of the property, but we would usually always find them..
We have spots in several areas and all with different terrains, and all of them show no sign of the hogs even coming through...
Im gonna try to get feeders going on a couple places that might allow it and hope that brings them back...