Just leave your car parked
The regional buses of the Montafonerbahn operate throughout the Montafon. The main lines run hourly from Schruns station. With the Montafonerbahn, you get from Bludenz station to Schruns. There you change to bus line 85 and take the bus to the "Explorer" stop in Gaschurn.
For the return trip
From Gaschurn you take bus line 85 back to Schruns station. From Schruns, the Montafonerbahn takes you to Bludenz.
mbs bus timetables
Arrival by train
From Bludenz station, the Montafonerbahn runs hourly (partially every half hour). There are also direct connections from Lindau (D) and from Bregenz.
mbs train timetable