Trip in January : delhi=>rishikesh=>haridwar=>sh imla=>manali=>dharamsala=>delh i

edoq

Hi,

I'm planning the following trip:
9 Jan Delhi-Haridwar by train, stay overnight at Haridwar
10 Jan Haridwar-Rishikesh by bus, stay 2 nights at Rishikesh
12 Jan travel from Rishikesh to Shimla thru Amballa Cant and Kalka by trains, arrive to Shimla in the morning 13th. Stay overnight
14 Jan take night bus to Manali. Stay 2 nights at Manali
17 Jan take night bus to Dharamsala, stay overnight
19 Jan take night bus to Delhi

questions are:
1. Is it ok in general, not too fast or something else?
2. What is better - Shimla=>Manali=>Dharamsala or Dharamsala=>Shimla=>Manali?
3. Maybe some places in this list worth more time and others can be skipped, especially in that (i.e. cold and maybe snowy) time of year?
4. Are there sleeping night buses? What would you recommend to make these overnight rides more comfortable?