Mate - go to a little town called Gunzenhausen which lies only 35-40 mins from Nuremberg. It has the Schorsch brewery, which is known for making some interesting Bock biers. It was in the Guinness Book of World Records for a while as having the strongest beers known to man! It also has a few cool lakes and some cool scenery.
Of course there are a tonne of cool biergartens in Munich to see and enjoy, but there are also heaps of smaller ones around and about. ANY town you stop in will have a biergarten with its own kellerbier or helles which will be amazing.
If you can afford the drive, go to Würzburg, which is a little further east of Gunzenhausen (another 20-30 mins) but that place is outrageous. Again, more local amazing biers, but also one of the oldest and prettiest cities (village really) in the area. That whole Frankonia area is really pretty.
I don't know the area that as well as some, but have lived there for a number of years so PM me if you want any specifics!