Sounds like you have ND plates. Correct? If the trucks have a local Virginia town and phone number, someone might put 2 and 2 together. Or if one of the drivers is stopped for some reason? A 1-800 number and a generic name or plain white paint job might be the way to continue incognito. You are likely justified (not an attorney) that the ND corporation is the owner and lessor if the thing goes to court, but Virginia is looking for any to tax anything that rolls. Suggest reading the regs closely; there might be something about where a vehicle is garaged overnight.