Start your journey by flying to Dehradun. From there, take a taxi to Haridwar. Visit Har Ki Pauri, a famous ghat on the banks of the Ganges, in the evening for the Ganga Aarti ceremony.
Drive to Guptkashi to rest for the night. On the way, visit Devprayag, the confluence of the Alaknanda and Bhagirathi rivers, and Rudraprayag, the confluence of the Mandakini and Alaknanda rivers.
Take a helicopter or trek to Kedarnath. Visit the Kedarnath Temple, one of the four Char Dham pilgrimage sites.
Return to Guptkashi by helicopter or trekking. Spend the evening relaxing and enjoying the beautiful scenery.
Drive to Rishikesh, the Yoga Capital of the World. Visit the Triveni Ghat for the Ganga Aarti ceremony, and try adventure sports like river rafting and bungee jumping.
Take a scenic drive to Mussoorie, a hill station known for its breathtaking views. Visit Kempty Falls and enjoy a cable car ride to Gun Hill.
End your trip with a visit to Dehradun. Visit the Robber's Cave, a natural cave formation, and the Mindrolling Monastery, a beautiful Buddhist temple. Depart from Dehradun for your flight back to Bangalore.
Consider visiting Badrinath, another Char Dham pilgrimage site, or the Valley of Flowers National Park. Hire a local guide for a more immersive experience, and don't forget to try the local cuisine.
You could also add a side trip to Auli, a popular ski resort, or go on a wildlife safari at the Rajaji National Park. Pack comfortable shoes, warm clothing, and sunscreen for your trip, and make sure to book accommodations and transportation in advance. Happy travels!