Update about location:
Location Tschiertschen-Praden, near Chur. the closest airport is Zürich-Kloten. Basel-Mulhouse is also quite close.
There are 2 trains per hour from Zurich to Church
The time travel is 1h15m or 1h30m and the cost around 26€ (37 CHF) each way.
You can check times, prices and purchase your ticket at:
http://mct.sbb.ch/mct/en/
There are public buses from Chur to Tschiertschen-Praden. They depart at the following times:
Fr: 07:15, 08:05, 09:05, 11:10, 12:10, 14:00, 16:05, 17:05, 19:10, 20:05, 22:10, 00:10
Sa: 07:15, 08:05, 09:05, 10:10, 12:10, 14:00, 16:05, 17:05, 18:05, 19:05, 20:10, 22:10, 00:10
More info on parking and camping area very soon!