In France, for Asian yellow jacket, I have seen (we had one nest at work) a professional use a kind of powder he sprayed at the entrance of the nest so every beast going out is touched by the powder and die in a few minutes.After they use the same powder with water to destroy the nest, the powder stay active for a while so the beast that are outside and come back after the destruction are contaminated also and will die. As you said , they are in full protection suit.