1.) First, check the availability of accommodation online- you can prefer GMVN (Garhwal Mandal Vikas Nigam), Paytm, Goibibo, etc.

2.) As you are a group of 7 travelers, you can easily afford a taxi like- Innova, Tavera, etc., which would cost you around INR 4500- 5000 /- per day. (for High season)

3.) Food and other things will cost you around INR 600- 800 per person.

Also, if you’re not bounded with time then you can plan for Auli and Chopta as well as Deoria Tal, Sari Village, Tungnath and Chandrashila.