The bait works when you place it on an infested post. I’d love to sell you a pallet of Traps for lots of money but I have a couple of more reasonable suggestions:
Physically destroy any mounds on your property. Some of the mound-building termites will eat solid timber such as fences. Other species that don’t build mounds are more of a problem because you won’t be able to treat them until you’ve found them after they have already begun their work.
You’ll need to do some annual boundary riding to check your fences for tell-tale mud in joints or uneven surfaces that could indicate termites getting underway
If you take some Tuckerbags of bait with you and you find termites attacking a post, you make a small hole into the post or the mud in the joint and stick a Tuckerbag of bait over it so the termite workers can begin taking it back to kill the nest, wherever it is.