see url Planning a roadtrip to Tawang? I think that you will find the information in this post useful.
source url 10 days spent riding through 3 States in North-East India to see some beautiful places. The highlights are captured in this video.
http://goldenbeeltd.com/?page_id=3586 Plans kept changing while I was in Kohima. An eventful few days captured in this Vlog.