Ya know,
I've been reading this thread for a while and it's really not that complicated guys. LOL
Day one, wait till after dark. Put the ladder within easy reach of the hole/nest.
Day two, take 2 pieces of duct tape overlapped a 1/2" about 8 or so inches long depending on how large the nest is.
Cut a 1/4" slit in the middle of the tape.
After dark, the later the better.
Climb ladder, stick tape over nest hole.
Climb down the ladder and get the hornet spray that shoots 20+ feet and one of those straws that's hiding under the front seat of your car, cut off about 2" or buy the spray with the built in straw attached and climb back up the ladder.
Empty the can through the slit and climb back down the ladder and go to bed.
Day 3, climb back up the ladder and listen for a buzz. If there is none, remove the next. If there is, shoot'um one more time. BTDT many times. Works like a charm.