Yes for visiting Kedarnath by Car the itinerary will be as follows:
Drive from Haridwar � Guptakashi via Rishikesh, Devprayag(194Kms/ 6-8 Hrs ).Overnight stay at Guptakashi.
For Kedarnath Darshan by Helicopter (Fly from Guptakashi-Phata Helipad- Kedarnath Helipad).On arrival check in to the hotel.Overnight at Guptakashi. Next day transfer from Guptakashi-Haridwar.
For Kedarnath Darshan by Trek- Drive to Sonprayag by car,from Sonprayag drive to Gaurikund by local transport.Trek starting from Gaurikund to Kedarnath (22 Kms) by trek (By poni, Doli, By Gorhi at own cost).Late evening arrival in Kedarnath,checking to the hotel and overnight stay in Hotel.Next day early morning Temple Darshan and trek back from Kedarnath to Guptakashi.Overnight at Guptakashi.Next day proceed for onward journey.
This travel agency was excellent!