I have some doubts that the county will be able to accomplish this task.
Do you have enough manpower to gather these things up? By the time you sweep one city, they'll have repopulated in the areas you've already sweeped. All it takes is missing one. Twelve hours later you have dozens again and have to start over.
Simply sweeping them into trucks or whatever won't work, because you have to go building by building, dumpster by dumpster, tree by tree, field by field.
If they manage to hitch a ride out of the county, the whole state is screwed. These things aren't pests. They're worse than locusts for grain crops.
Have we been checking cargo ships, airplanes, and cars? I've seen people who've found them in their engines, gas tanks, and hidden in the undercarriage of their cars. There was a large amount of time before anyone realized how bad it was, too, where one could have hitched a ride out.
We need a more scientific and drastic solution than animal control.