Hi Pondfisher, Medicine Hat does have a club, it's the "Medicine Hat Fish
& Game Association". Here's a link
http://www.mhfishandgame.com/
As far as fly shops, that's a no go. We have a local store called the Outdoorsman, but their supplies are limited when it comes to fly fishing.
I've never fly fished for goldeye on the SSR, but I've caught them using other methods on just about every accessible point along the river.