So I went to see Dr. McArthur earlier this week. He actually seems a bit more "old school" in that he's reluctant to do hip replacements on younger people. He also told me that while I have Perthes deformaties (and that these make replacement more challenging), I also still have good cartilage space. He prescribed Meloxicam (which I've never taken) and PT, and may move onto injections as a next step, so I see these as my next steps.
I know that this is a bit against the grain of opinions on this site, but I also see it as a vindication that my situation is not as straightforward as it could be. As an example, a couple weekends ago I went to a local natural area that features a very steep trail with a climb of 500 feet over perhaps half a mile. As a challenge, I went about as fast as I could and easily beat the other members of my group (who were fairly seasoned hikers). I was a bit stiff the next day, but not in what I'd call bad pain. And then I read some of the testimonials here from people who have trouble getting around or putting on socks and it's clear that I don't have it so bad. The problem of course is when the pain comes on, and there are situations that can cause me a lot of pain, but obviously I try to avoid those as much as possible.
I don't think that anyone is trying to mislead me or sell me on anything that they don't really believe is good for me, it's just a tough situation, but I'll continue to manage it as I can.