Have some cold beverages with your buddies, remove plugs from shotguns,load all shotguns with #8 or #9 shot. Get one buddy that has been over served to agitate the wasp nest and run(stumble) out of the way, let the shooting begin as they exit the nest..keep shooting and re-loading until problem is solved..
Disclaimer: I have never done this with wasps but I have done it to a beehive in a tree with several
amigos... The trick is to not stop shooting at anytime until the flights have ended....
Let us know how it worked out, take pictures!
Col. A 1976