Go to the DMV in the state you purchase the trailer in, get a one trip permit and drag that thing to Idaho and put it on your private property. Why would you need to register again if it’s just sitting on private property?

I hope it’s winter equipped.

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1981 240D Four on the floor, Orient Red over Parchment, bought with 154,000 but it's a daily driver and up to 180,000 miles, mostly original paint and all original interior.