There gold! Keep traps at base will help control #. Many times cant see opening or think hole is way to small. Watch for claw marks in bark of big trees on uphill side.
I don't know the actual mix there using in the drones but my bet less than 1QT of 41% per acre. We use 2% in backpack sprayers with leaves almost 50% yellow before fall drop with excellent results..
41% is supper cheap and about 100% effective in fall. In MO the drones work fast and efficient that time of year when have no wind. Now BH skeletons take forever to decompose without fire. You guys keep talking about how great invasive BS cover is. After so many years ( 10+) your property value...
Watch vids, interesting. They where saying multiflora rose was so thick fawns would get into and die, not able to escape. Also drone survey vids showing bush honeysuckle was making big difference from north Iowa down to STL on mature bucks.
Much of what was prime deer land in Iowa has been taken over by invasives. Lee Lakosky has Utube video saying because of habitat timber mis management major % of his land no longer holds deer. Now spending much time and $$ to restore.