Hmm, Jurgen, that's funny that you mention being able to take pictures of kids easily. I was in Vietnam last year, and in most places (especially the North), children had been taught to hide their face as soon as they see a camera, since they want money in exchange, and you can just forget your picture if you don't pay!That was especially true in Sapa (Hill Tribes people) and in any rural place. I had no problems taking pictures of people in towns though, quite on the contrary...
If you get a chance, Ed, try Hoi An and Hanoi (the old town) for gorgeous pictures of old buildings. And Sapa and Halong Bay for the scenery...
Personally, I would avoid the heavy camera equipment. It's just to much effort worrying if it's going to be stolen or what.
Oh, by the way, stay away from monkeys!!! I got viciously bit by some, and had to get rabies shots for a full month! I still have the scar from the one who bit me 18 months ago! They WILL bite if you don't give them whatever they want...
Have a great trip!
Sylvia