Because I don't have anything better to do.....
http://www.bavarian-alps.travel/en/offers
I googled 'ski package to Germany' (can't be many, it did also give me the cost of a courier!)
Oh...read your question again..no experience of skiing in Germany myself, but my son went there last year with air cadets.
Skied in several resorts (he couldn't remember the names of any when he got back, but I found a lift pass in his pocket and Obertsdorf was one of them) He didn't go to Garmisch I know that but said the ones he did go to were all pretty small.
He had a good time and the snow was very good.
http://www.skigermany.com/
gives some info too.