Oh yeah. Wasps, yellow jackets, hornets. We have them all! Bleach, by the way works for all of those stings!
As for the wasps, the only natural enemy of the fly. While I I won’t make any moves to clear them out, one very easy and effective way to keep them away from your gathering areas. Hang a gray or brown colored Japanese paper lantern or even a brown paper bag. Why? The number one enemy of the wasp is the hornet. Wasps see this and think it’s a hornet’s nest. They steer clear.
I fight stingers with stingers! Works!