Will it work?
No way to answer that. Swarm traps and offering old comb and lures increase your chances, but how do you measure success?
If no swarms take up residence, is that failure if no swarms were issued in the area?
If you caught a swarm, how many bypassed your trap that were not even seen?
While I think bees will be successful, propagate, and multiply in areas with abundant resources, this may have to do with logistics of flow dynamics and available timing to allow bees to deal with overwintering, etc. No doubt bees would be seen on a map, if possible to mark every feral hive, as less in some areas, and greater concentrations in others. But I think that would be more of a "region" type indication based on a host of factors.
I do not think that micro-placement of swarm traps in a confined area around hives, and selecting for one clump of trees over another, thinking they will favor a certain trap, based on nectar, would make a difference.