Right now the main Highway from delhi to Chandigarh is close due to farmers strike. but bus are going via some other route. Plan: Day 1. Go to Majnu ka Teela/ISBT Delhi in evening take a bus to Manali. you can take bus for Mandi also. from Mandi you can take Bus to manali also. leave the bus at Bhuntar 10 km before kullu. from bhuntar you can get share taxi for kasol. after reaching kasol you can get cheap hotel and homestay around 500 per night. eat outside and have fun.
If you are local from north delhi than you can go via lampur border or dahesra border to bhalgarh... no road blockage from bhalgarh to Chandigarh..buses prefer loni - baghpat- bhalgarh or loni -baghpat- shaamli- karnal