My group has never experienced the "Biblical Yellow Jackets" that others have reported on the Main Salmon. They are always around, but have never been bothersome. We have never had any issues with them at all of the MFS, but then we are always on the river in early to mid September when it's pleasant to slightly cool weather.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb