The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
One nice thing about the Caddis wading shoes are they are designed to be true to size of your street shoe. So if you wear a size 12 shoe everyday a size 12 Caddis wading shoe will be the correct size for one pair of wading socks. I have three pairs of the Caddis shoes, each one a different model for different applications. For rivers with lots of rubble and big rocks I prefer a wading shoe with strong synthetic uppers that reach up above my ankles a few inches and have padding around the outside edge. In my opinion it is hard to beat the Simms Freestones.
Cut back on the squats and other free weights for a year or two.
Seriously hip boots are often more restrictive than waist of chest waders. You should consider breathable waist waders. I think the calf area will offer more room for you to feel comfortable. The cost for a decent pair is about $100. But then you also need a pair of wading shoes.