Explore Parvati valley, go to Manikaran Sahib Gurdwara, board a taxi and head to "Gulaba," near Manali, it's like a peaceful hideout, far better and beautiful than Rohtang Pass. Go to Kullu for paragliding, which is better than Solang valley ,. There's nothing to do in kasol for 5 days,. Go to old Manali and explore the amazing cafe's there!!