Those shots from your last trip look great. Made me realize that I need my act together and get my southeast asia photos online. As far as the dslr vs. rangefinder debate, I don't know what to tell you. Those shots look good, so maybe you should bring the dslr. I know when I was in Laos with my leica cl and 3 lenses (21,40,90), and was hanging out with a swiss german guy with a dslr, I was often jealous of his 25-300 zoom lens and his ability to change iso willie nillie. But then again, all my stuff fit easily into a beat up canvas shoulder bag that was easy to carry and unobtrusive, while he carried, in plain view, a shiny new camera with a lens the size of my forearm.
My preference is the small rf kit.
BTW- what CV lens are you looking to get?