That's quite a username!
Have you taken a look at the suggested trip plans for Laos and Cambodia? They may help you with the planning.
Hey Mister Majeikasboot,
Take a look at a site called TravelChums. It is designed to help single travellers looking to visit a specific place find a travel partner. Others may be able to suggest similar sites.
There seem to be more and more posts of people looking to find a travel partner for a few days or so. Is it worth starting a new category for travel partners like you did for visa and border topics, or is that something you'd rather avoid?