Running around in the mountains, you see the magic of Pan around you everywhere. He is normally depicted playing his panpipes and leading Fey, Satyr and Nymphs in a wild dance. In approach to life, he does strongly resemble his nephew Dionysus
He is typically revered by Barbarians, Druids and others that live in the mountains.
There is no real dogma that Pan follows, he just cares for having fun, though instead of his brother, he tends not to drink as much or nothing at all.
Usually followers of Pan do not group together, but work on their own. Temples are not dedicated to Pan, if followers do flock together, they do so in mountain glens.
As there are no temples, Clerics, Druids and other followers of Pan have no service requirement. The Clerics wear olive-green garb and tend to be busy protecting mountain glens, forest glades and mainly the small animals that dwell there.
Pan will not approve of eating small animals, of course unless you found them being dead already.