Did it in '85 from Minden. The return journey was fun. The bus goes up the hill and the p1ss goes to the back of the bus, go down and it goes to the front. Accelerate - back, and brake, to the front. Fluid dynamics - fascinating. When a bus is going at 100kmh and you try to hurl from one of the top slit-windows, the outside pressure blows the Wurstherfmix back into the bus and onto George Wales's lap. Aerodynamics - fascinating.
I think that it is on a tues, after 1 or 2 pm. Only lasts for 40 mins.
Starts in the bar, whistle stop tour of the vats, short vid (in German), bottle factory. Finish in Bar. Bar trhen open to about 3.30. As much free drink as you can get down ya neck in that time. You drink it quickly, another reappears just as quick.
Bar shuts and you are expected to leave. However, its a short stroll to a pub just outside the brewery grounds.
Enjoy. Oh, the tour guide may not speak english, so take someone who speaks Bosch or accept that the tour may not be informative, but may actually only last 20 mins...more time in the bar then!