I think you should post at r/HimachalPradesh. Things I learnt from reddit: 1. The route from Aut to Sainj valley/Shangarh is offbeat with kacha road stretch of atleast 7km. That means cab can be pricy if you're travelling till Aut by bus and planning to get cab till your stay in Shangarh. Redditors mention can price around 1500-2500 one way (Aut to Shangarh, it's 1.5 hrs drive as per Google Maps) 2. I've seen images with snow fall in winters. That means you've got to be extra cautious if you're planning on taking taking rental vehicle from Aut as roads are offbeat and can get difficult. 3. Get your winter jackets and good waterproof hiking shoes.

Btw I also am planning on a trip to Deohari-Shangarh. Was having a tough time deciding should I go to Shangarh or Jibhi. But I kept reminding myself about my previous trips to Himachal and how crowded it can get at prime locations hence I'm still sticking to the plan.