Rule # 1 from what I have been reading is STAY CALM!!! Freaking the fuck out is one of the fastest ways to get stung because they can pick up on those pheremones(sp) that you are producing as well as the ones left on you by the attackers.
Try to identify their nests by the holes in the ground (entrance and exit holes) and if you plan to tackle them, do it later in the evening when they are winding down.
My best advise is to attempt to locate their source before you dig so you dont get a nasty unwanted surprise.
Possession = 9/10 of the law
Perception = 9/10 of reality
Vaporization > Combustion