Multiple registrations / tags on vehicles?

Factual Questions
1

Travelling back home from the airport this afternoon, heading up I-25 northbound, I passed a newer-model Winnebago RV that had Indiana and Minnesota plates attached to it. I immediately though, “Hrm, ID & MN are kinda in the same region, but that’s gotta be expensive. . . maintaining two registrations like that.”

I recalled, as a kid in the car on the NJ Turnpike, watching trailers with multiple plates, but they weren’t self-powered, just pulled by the Peterbilts & Macks on the highway. So, I’m a little confused why someone would seemingly double their registration costs. Unfortunately, I did not get a picture (especially while driving).

What, if any, possible benefit would there be?

Tripler
Before you ask, no, it wasn’t Walter White’s RV.

2

Here is a Quora thread with answers to your question. Basically, it’s because of taxing commercial vehicles to operate in those states.

Now, who’s Walter White and what’s with his RV?

3

Walter White from Breaking Bad had a meth lab That kinda sounds like the opening to a nursery rhyme . . .

I see the now-apparently antiquated practice of the “bingo card,” but the RV I saw yesterday looked to be a non-commercial, private RV. . .

Tripler
No idea why a rolling meth lab would want double registration. . .

4

My guess is that the property tax is cheaper in one of the two states, and so the owner only pays for the fraction of the year that the vehicle spends in that state.