Some of your story sounds so familiar -- walking like a statue . My husbands major symptoms are stiffness and rigidity. The shuffle is what clued me in the most though. I can always hear him coming anywhere in the house because of his shuffle. He shuffles much worse barefoot in the house then when outside walking. I think because he doesn't think or concentrate on walking so much when home. I never know if I should remind him to try to overcome it some( like he does when out and about), or just let him be - it must be so frustrating for him, seems like he should just be able to relax at home and not "think" about how he's walking. But I am not sure if I'm right or not. As for the bedroom -- he is not a statue there and there are no problems at all in that regard -- quite the opposite, the problems would be more on my end. I can definitely resonate with what you said about smooth movement -- that is so amazingly similar to what I said to the Neurologist, I didn't know how to describe it except to say that his movements were mechanical --not fluid.
I'm so sorry your husband went misdiagnosed for so long, and that the doc didn't believe you. We had the opposite happen. The PCP did mention PD quickly(my husband didn't even hear him say it, but I did), but I think he was thinking more MS, and sent him to a neuro. But the neurologist diagnosed him at the first visit -- I was shocked! It was what I had been thinking for months but I never though that a doc would agree and diagnose him so quickly. When we left the office my husband said : "See, you should have been a neurologist"
Got to run, Hugs back to you