Just leave your car standing
The Montafonerbahn regional buses operate throughout the Montafon. The main lines run hourly from Schruns station. With bus line 87 you get from Schruns station to Gargellen. There you get off at the final stop "Schafbergbahn" and reach the valley station Bergbahnen Gargellen via the bridge in about 5-10 minutes on foot.
For the return trip:
From Gargellen you take bus line 87 back to Schruns station.
Bus schedules mbs Bus
Arrival by train
From Bludenz station the Montafonerbahn runs hourly (partly every half hour). There are also direct connections from Lindau (D) and from Bregenz.
Train timetable mbs Bahn