Based on different type of accommodation during a trek:
- Camping treks (in tents on sharing)
- Tea House/lodging treks & Homestay treks
In Indian Himalayas, most of the treks are fully camping treks. During these multi day treks , your accommodation will be either in 3 or 2 persons tent on sharing basis.
Normally there will be motor able road till all the trek bases (trek starting points) and these places have basic lodging accommodation with few exceptions.
In some Himalayan treks it is possible to stay in local homes. Expect simple rooms, local food and culture during your stay.
In Indian Himalayas there are few trails where you can get Tea-house or Lodge/Trekkers Hut/Forest Bungalow on the way. These are basic accommodations and rooms are triple/quad or dormitory type sharing basis.