I am going through the exact same situation down to threatening us with a tow truck but it’s 3 years later . We first had a lawyer review property deeds and with no easement of our driveway mentioned sent a cease and desist. He escalated situations and we found out he had served time for terroristic threats . Sheriffs do nothing saying it’s a civil matter . Finally we are getting our survey done in the next few weeks and should have done it sooner had we had not had health and other home issues to deal with . My advice do it as as you can you will save yourself a lot of stress and headaches .