I have a rarely-used auto that needed emissions testing done yearly in my residence state of Illinois (before I moved to Tennessee), where it was registered. I stored the vehicle in Tennessee, at our 2nd home, though, and didn't see any sense of driving it 10 hours just to get tested. In Illinois, you needed to pass the emissions test in order to be allowed to register and get plates. I applied for an extension/exemption from testing, due to the car being in storage, out of state, and was still able to plate the vehicle. All that was needed was some sort of documentation showing where the vehicle was stored. I was able to do this for two years before the state no longer granted the extensions... but I was ready to change my residency by then. Perhaps you can do something similar with your stored camper...?
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