In 2016, Madras went so far as to hire an event planner to organize the logistics [1]. The town has a web site with pointers to camp sites, RV parking, and day parking. (Sure, you can probably just pull off onto the side of the road, stop your car, and watch the eclipse for free, but if you want/need to be near, say, a porta-potty, this info might be useful).
> Sure, you can probably just pull off onto the side of the road, stop your car, and watch the eclipse for free, [...]
They say not to do that. From the FAQ at the Madras eclipse site:
> Can we park on the side of the highways & roadways?
> No. The Eclipse is occurring at the height of fire season in an agriculturally dominant landscape. Over-heated vehicles are of major concern. Pulling your vehicle off on to an area that is not designated for parking is not only dangerous for yourself and other drivers, but can also produce a fire.
[1] http://www.opb.org/news/article/solar-eclipse-madras-oregon-...
[2] http://madraseclipse.com/