Hire a bike if you are really good at driving ...start from Delhi to Manali at 6.00am or early as possible..from Delhi and go to Manali...pre book your hotel at Manali...and try to stay in Manali for 4 or more days....visit the near by places such as Solang valley, Rohtang pass... and many more if you reach there .....and you will get to know the places....by the locals... travel in last week of May.... Rohtang pass will be definitely open by that time ..