According to Nolo.com, in order for someone to commit an act of criminal trespass, the individual must be on your property without permission and must also be aware of this fact. For example, if someone accidentally wanders onto your property while hiking along a nearby trail, you may not be legally justified if you point your gun at the person.
People roll through my driveway every now and again. Usually it is real estate people who “heard it was for sale” because the “owner is in a nursing home”. That owner died a year ago and we bought the house from the family. In reality, they are just trolling for houses to sell.