We've been using River Shuttles out of Salmon for many years with no issues. The OP has been given several good choices, but all of them are going to be about the same price. $350ish is the going rate for that particular shuttle. I doubt you'll find one substantially lower.
"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