Make sure you have your lines way out. Some use planer boards to get them out to the sides too. But I haven't used them out there. Use black/white, purple/grey, blue/white, or green/white bucktails. There are a thousand other combinations. But those are some of my favorites out on Kootenay. I usually troll fairly fast as well.
Here is a website with lots of good information on Kootenay Lake.
http://www.kootenayangler.com/
Good luck and tight lines.