Penticton, Canada
If you don't have your own flotation device or can't arrange transport, Coyote Cruises is a convenient way to go. They provide tube rentals (good to the halfway point of the channel only) and operate a shuttle bus service to transport you back to the parking area on the north side of town.
Listen to the audio guide for Coyote Cruises - Channel Float Free on WIP — starts by itself when you arrive, even with the screen off