Half of the campsites at Many Glacier are available for advance reservations. Backcountry Permits. Backcountry sites can be reserved in advance starting March 15 for groups of 1-8 campers and March 1 for groups of 9-12 campers. There is a $40 application fee ($10 administrative fee + $30 fulfilled trip request fee) for EACH application you submit. The camping fee of $7 / night / person is due upon picking up your permit. Applications can be submitted ONLINE ONLY.