Start from Delhi - Haridwar - Rishikesh(Stay) - Srinagar(Stay) - Joshimath(Stay Up at Auli) - Valley of Flower / Hemkunth Sahib(From Gobind Dham you'll be on your foots) -Back to Joshimath - Badrinath (Stay) - Mana Village - Badrinath - Srinagar (Stay) - To Delhi. This route is clear and motor-able. Start early, sleep early for every break. P.S. There are so many place on the way to Mana from Delhi so give them your time.