Great, so you should have both the highways open by then. Pls don't fear for heights and dangerous passes as exclaimed by fellow IRI members, I myself have done the Himachal Tribal circuit and BRO (Border Road Organisation) maintains it and it is completely safe to travel on those roads, Army is also well deployed at the various checkpoints and they will inform you about the road ahead and precautions to be taken. It would be once in a lifetime trip, so don't miss it and just plan it wisely and keep checking every week about the road opening information.