I'm taking my bike to Thailand and am planning to do a tour. I've done several 2-3 week tours there in the past. This time I am thinking of Chaing Mai to Mae Sot then to Khon Kaen, from there head south to Cambodia entering by Anlong Veng, then across to Aranyaphatet and back to Bangkok. I estimate that it will be a 23 day trip. On top of that I have 12 extra days to continue after the planned trip or to add on to the planned trip.
Although the above dates are firm, my route isn't. If you are going to be in Thailand at the same time and are looking for a partner let me know and maybe we can hook up.