Not to diminish your situation, but I dont feel like SHB have been a huge threat so far. They can be a bit unerving, especially when we have heard horror stories of honey running from hives, bees, absconding, bees in panic, slimed comb, etc. but in many cases they can be easily controlled by a few simple things. First, as John said, strong, healthy colonies are not at risk. Bees keep them at bay, and are just more of a nuisence. Also, put your hives in the sun. Colonies in the sun do better than colonies in the shade anyway. SHB are more likely found in colonies that are shaded for a large portion of the day. Ground drenches have been found to be useless, most "chemical" alternatives aren't effective, and most "gadgets" take up space. SHB are only a problem in weak colonies, and I personally believe in the theory that only the strong survive, and if weaker colonies are sacrificed, then there was a reason they were destined to fail. I know it may sound harsh, but I feel the answer to overcoming things like varroa, SHB, and other pests and diseases lies with the bees. Hygeinic bees are bees that have learned to survive
"Mites are choking them, pesticides are killing them, the drought's starving them... they're fine." Ulysses "Ulee" Jackson in the movie "Ulee's Gold".