Accomomodations in HP

Hello Vargis,
Me and my wife will reach Shimla on 30/09/2021 & start our tour on 03/10/2021. We have a plan to visit Sarahan, Sangla, Chitkul, Kalpa, Nako, Tabo, Dhankar, Mudh, Kaza, Lanza, Hikkim, Komic, Kibber, Chandratal & to exit through Manali tentatively on 14/10/2021. Can you please suggest good budget hotels/guest house in these places. Also please inform as to whether 'advance booking' is necessary. Please guide me.