As far as I have experienced, you can only get tiny samples at the distilleries, maybe amounting up to 1.5 shots in total. Not enough to get drunk, though most will feel a little something. The most samples I have ever had is 5 and they were about small-thimble-sized.

And it is hard to fit in more than 2 distilleries a day; might get 3 if efficient and do not waste any time.

The heavy consumption is back at the host hotel in the evening!