For people riding in Minnesota here is what the DNR trails coordinator wrote to me about the OHV requirements. Notice that he describes reciprocity for out of state registered vehicles that lasts for a 30 day period.
"The second item of discussion seems to Off-Highway Motorcycles (OHM) or specifically dual sport bikes. We have no â€˜Trail Passâ€™ or â€˜Permitâ€™ requirements for OHMs in Minnesota. We do have â€˜Registrationâ€™ requirements in our state. OHMs operated in MN must be registered with the DNR. Dual sport OHMs that are legally licensed for highway use are not required to be registered with the DNR if they are only operated on state forest roads. But, if dual sport OHMs are operated on designated OHM trails (off road), then DNR registration is required. MN DNR OHM registration is not required on OHMs if they are: Owned and used by the United States, an Indian tribal government, the state, another state, or a political subdivision; OR if the OHM is: Registered in another state or country and has not been within this state for more than 30 consecutive days."