As for insurance, it depends on the policy. I never had a problem with the plate, but it was in a locked storage facility, was not moved, so who would know. I think if you were to store it at a campground that was open to the public, and if the police wanted to take issue, then you might have a problem, I really don't know, it never became an issue. I know the site we used to park in was adamant that every unit had to have current tags or they would not let you stay.
Ed