I have gone touring with a BOB Yak (it was pulled by a mountain bike that could not take panniers) and more recently my trailer of choice is am
Extrawheel Voyager which is only used when I need the extra capacity for carrying water (I prefer touring in more remote areas of Australia). I am therefore curious as to why you wish to tour in Cambodia with a trailer. That reasoning would then drive my choice of no trailer, two wheels or single wheel.