the german resorts around garmisch are small by european mega-resort standards. but there is plenty of great terrain. the zugspitze mountain itself (accessed by that canle car an a tram) has a small ski area, partially on a small glacier and has no resort run, but a long season.
the other garmisch resorts are mostly below treeline.
one of the most interesting things in the region is the dammkar in mittenwald, basically a huge 3000ft vertical couloir, accessed by a cable car and not groomed. see: http://www.zfgr.de/karwendelbahn/
sitting on the very north of the alps, garmisch is equally prone to heavy snow if storms from NW arrive (most common storm pattern) and the föhn, (like chinook) wihich will kill the snow on a regular basis. rain at resort level is likely once in a while, as it sits on only 800meters.
that all doen's really hurt, since dozens
of world class resorts in austria are within reach.