Hi Joern,
I have some friends that are crossing and they have a start date to start crossing on the 2nd February, I think they are crossing on there own.
Just for your reference if your are going to spend any time in Thailand,
My wife and I have just had just completed building a Overlanders Stop in Thailand if you are looking for somewhere safe to park up with good facilities in South East Thailand, only 1 hour from Bangkok.
Dave