The diet change seems to be helping. I don't know if it's psychosomatic, or actually real. However, I have noticed that since I stopped snacking on sugary treats during the day and reduced my protein intake, my symptoms are not as pronounced as they were. I seem to have less off time, and my meds seem to kick in a faster than they did.
It didn't help that my mom came into town toting a brisket for the family (since the wife is vegetarian and does most of the cooking, my kids and I love when Grandma brings a brisket over). However, she will probably not continue bringing them cross-country. I told her about my food experiment and she basically said she wasn't bringing it anymore. I still had an occasional sweet, usually at night before bed and when I wasn't concerned about my gait or tremor as much because everyone was asleep. However, I cut out all the juice I was drinking and non-diet soda. I had previously tried not drinking diet-soda and would have juice or Sprite instead, but that did not seem to have any impact.
It's only been a week, but it's a rare positive in a recent sea of negatives, so I'm hopeful.
Thanks to those who tweeted in response to my previous post. It's good to hear from people both in comments (I have none so far) and via twitter.
Warning about twitter - I am very liberal, even more so than when I was in my 20s and 30s. Life usually pushes you one way or the other. So, if that doesn't float your boat, that's ok. Ignore those posts.