I live on the TN/VA border and go to the cattle market in VA in my farm trucks and asked the same question at our local VDOT station and was told "as long as the truck is strictly farm use there are no requirements for inspection, insurance or tags other than the truck must be clearly marked for farm use". Farm trucks carry the same restrictions as tractors and must have a reflective triangle mounted in plain view of vechicles behind you.
However, any time you deal with the state or local goverment you will get a different answer to the same question each time you ask.
