Day 1 - Reach Bhuntar
Bhuntar is the main bus stop, since most of the buses head to Manali, this is as far as you can go in your Volvo buses.
Get off at Bhuntar, ask for directions to the local bus stop and catch a bus headed towards Kasol. Tickets to Kasol are usually around 30 rupees per person.
If you are not comfortable with the bus, you can take a taxi - but they are expensive. I heard a taxi driver say 1800 rupees to take me to Kasol from Bhuntar, and I started walking towards the bus stop.
Take the bus to Kasol. The buses are slow. The roads are narrow, the bridges are narrower. There are stops to let the traffic of the other side pass, and then your side is allowed.
Takes around 1h to 1h30m to reach Kasol depending on the traffic.
PRO TIP - Rush in the bus and find a seat for yourself, don't wait. If you don't, you will be standing till Kasol.
Get down at Kasol bus stop.