You're always trespassing once the owner tells you to leave.
Pretty sure you're ignorant of laws.
Criminal trespass is defined in the Texas statutes as when an individual:
“…enters or remains on or in property of another, including residential land, agricultural land, a recreational vehicle park, a building, or an aircraft or other vehicle, without effective consent and the person:
(1) had notice that the entry was forbidden; or
(2) received notice to depart but failed to do so.”
In other words, you can face this charge if you enter someone’s property when you know the entry is prohibited – or if you remain on the property after being asked to leave.
You must enter the property with your entire body, whether in person or in a vehicle, for charges to apply.