Sounds like a great adventure!
What year is your DR650 and how many miles are on it? I will be curious to see how well the Shinko 244 and the 520 chain set up holds up. Several RTW riders on DR650's had big problems with the 520 chain set-up as the front sprockets played havoc with the sprocket shaft splines.
I really like your travel light mentality. Too many riders tend to overload their bikes.
Best of luck and enjoy the ride!