I don't know about your place, but the Yellowjackets were massive at my place over the summer.

So, here ya go for next year. After trial and error at my homestead, this was the best Yellowjacket killer I have found. (Disposable Rescue Yellowjacket Trap)

And, what is great about it is that after it is full of Yellowjackets, it catches tons of flies. Ain't Life Grand?