In the episode 12s and 14s are being used. The fish aren't biting the Spin N Glo, it's just an attractor so larger sizes might work well also. www.anglerwesttv.com/spin-n-glo.aspx
I took a trip with Cameron and it was amazing. River blown out, his addicted friends were laughing at him for trying before the seminar down in southern Wa. I caught a monster wild hen. He taught me how to bobber dog.
Maybe 1.5mph. Typically a little slower. They will start to spin at higher speeds and usually, especially when the water is cool, the fish like slower speeds. When the water warms up try trolling faster with a Sling Blade that can handle faster speeds.
Just watch the wind forecast....don't get caught out there in a small, or even medium boat with low freeboard on a windy day. It CAN get a bit scary and have heard of sunk boats.
The Kokanee are very spooky, especially on calm days. By dropping your lures a few feet under the surface, they might be a little less hesitant to bite. At least that's the theory.