If one is not familiar with I-84, in some places the divided highway is really divided, and the combined speed was probably over 100 miles an hour
We usually cruise abt 55 and I presume the others about the same, or more, so I didn't have a long time to watch. They were in groups, 3 or more, sometimes spaced by 10 miles, but seemingly all with the same destination or event planned.
Some were original, a little faded. Some were repainted in bolder colors. I thought a couple had decals on the side - like you'd see on luggage back in the day (probably vinyl rather than whatever they used to be made of.)
Anyway, it was interesting and would have been fun to encounter them stopped somewhere for a better look.
We commented that in their day, they would have been the envy of the neighborhood in their state of the art simplicity for camping.
Sisters on the Fly, huh? Will have to bing that.