Yeah, i've already marked 2 nests, both in the root system of a massive oak in my front yard. The stick idea is a good one, i just used a little plastic flag, and had to run when doing it cuz the bees, apparently, don't like me messing with their house.
I want to stay away from gas/turpentine etc. I did try putting a sheet of black plastic over the hole and staking it all around, the next night i pulled the sheet off and there were dozens of dead bees underneath, i guess the premise is that they get out of the hole and cook in the heat under the black plastic. Didn't get them all, though, both holes are still active, and i'm sure the queen is still fat and happy inside.
Damn allergies.
Interesting to see everyone's different approaches to this.
Thanks
-Skinny