I made a self-organized extended tour to Northern Chad in March/April this year including Ennedi, Erg du Djourab and Faya. We have been invited by the Prefet who assured us that we were free to go everywhere in his B.E.T. country. However, he was not able to provide us with the obligatory guide knowing the NEW minefileds north of Faya along the route to Zouar. Moreover, the Chadian military people which we had to contact refused strictly to enter the 'battle zone' north of Faya.
Going to Sherda from Seguedine is rather risky as we learned from local people in Faya that there are highwaymen waiting for 4WDs between Mumr and Sherda.
Security in Faya as well as in Fada and Ennedi is still being poor due to permanent rebel attacks during night. We heard machine gun fire and even artillery in Fada.
Tibesti is absolutely out of reach presently and in the near future. In my opinion it makes no sense to make plans for visiting Tibesti mountains (Bardai) as long as the political problems have not been solved.