Welcome to All Things Plants. I would be heartbroken if this occurred. I could not have helped you, but you've gotten some great advice. If we ever have to hire people to work on the property, we will do our best to protect what we can.
We will be having a lot of people over the next three weekends, and we will be putting up caution tape, flags, or some such... Don't park here! I've got some struggling baby yuccas and small native plants that do not need heavy vehicles resting on them.