Maybe some good news. Looks like we've disturbed the nest enough with what spray we used last night that I think they are gone. I can bang on the wall now and it is silent and I spent 15 minutes watching the opening where the were flying in and out yesterday and I never saw a bee.

I spoke to my Dad about it this morning and he said his father kept bee hives when he was young and that the bees are rather picky and would probably move on since we sprayed the opening.

Now my only concern is if they left much honey in the wall. Guess we'll have to figure out how we are going to handle that once we know for certain they are gone.