I was dx in 2011. I'm also a Vietnam veteran. I started volunteering at my VA after my dx. I spent the most time with the PD vets in the nh. Right now my VA took away my vol status because I spoke out against neglect. I have gotten little help from vet org or gov reps on this.
I walk 4 or so or miles, it helps me shoe away PD lol. I think having a life goal and my PD ignore button helps the most. Another thing I do is practice concentration. I think it helps retrain the brain lol. I take little meds. I'm 73 now doing more than when it began.