Inputs from a cyclist 🚲
Palchan (10 km out of Manali) - Army transit camp
Cross Rohtang
Multiple accommodation at Tandi / Keylong
Hotel at Jispa
BRO and other camps at /around Zing Zing Bar
Army camps (with Hamam) at Sarchu and Pang
Other private tent camps
Small dhabas and Maggie stalls give you overnight mattresses
If you don't have very pronounced altitude issues, take 3-5 days across..... See the landscape, the 5 passes, Debring plains, Gata Loop. Possibly a short diversion to Lake Tso Moriri.
Remember: the remote zone is only from Baralachla to Tanglangla - 175 Km.
Your vehicle is enough support in case of any altitude issues
Wherever you stop re-aclamatize : a very slow 50m walk on a gentle upslope.
Hydrate
Serious symptoms - drop altitude
Never sleep at the high point of the day.