Couldn't follow your link, but googled it and found the correct link from this blog, good share
https://thegunblog.ca/2019/06/10/take-this-5-minute-survey-on-shooting-hunting-for-ofah-csaaa/
Lots of good lakes, but for rivers, he wasted his money for that area.
Gold creek and kootenay river would be the closest besides flathead, but better water on the east slopes.
"simply disposing of infected fish parts in a clean drainage could provide enough spores to start an infection"
Only a qualified biologist could know for sure though!
Actually the quote BurningChrome posted first tells you to put the infected fish in the landfill so it doesn't risk getting back into a water system...
http://whirlingdisease.montana.edu/about/anglers.htm
Dispose of fish entrails and skeletal parts properly. Never discard fish parts in or near streams or rivers. Because an infected fish may harbor tens of thousands of myxospores, simply disposing of infected fish parts in a clean drainage could provide enough spores to start an infection. Do not discard fish parts in a kitchen disposal. Whirling disease myxospores can survive most wastewater treatment systems. Instead, discard in dry waste that would go to a landfill.
Subaru Forester Touring...AWD,heated seats, huge sun roof and 7.0L/100kms on the hwy. I test drove everything mentioned above and this was my choice because it was the most comfortable and the best on gas.