I also live in NC. Do you own any other registered trailers? None of my trailers have a readable vin except a homemade one that has the numbers stamped on the tongue. I just move the registration plate to the trailer I'm using. Been stopped numerous times at checkpoints without a problem. All the state is interested in is revenue from a valid plate. Legal option is register it as home made and they will assign you a vin number that you stamp on the frame. When I done that (quite a few years ago)they loaned me the stamps and then came out in parking lot to verify it was stamped. They did not inspect trailer for lights,brakes, etc. They charge for all of this and estimate value so county can tax it every year.