I think it's a great idea for a visitor. If I was hitting 4 breweries in a day, I wouldn't be driving. I've visited about 80% of the brewpubs in Portland and toured a half dozen breweries, ranging from Hair of the Dog to Widmer. Some of them look like a slightly scaled homebrew rig. Widmer has 1000 barrel fermentors.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk