No, haven't been there, or Vietnam, or Burma. I think Celtic
Knot has been to Angkor wat.
SO and I did go to a few ulu provinces in China (yunan, guizhou,
xinjiang)...so if you need info on those, I can share some tips.

Hmm...weather-wise, it seems can still go to parts of China by
early-Nov....avoid the school hols.
Edit: sorry, typo.