Red Gate farms will allow you to leave your car at their property. We do recommend carpooling. Uber and Lyft are options to get back to your hotels if needed.
If your invitation says "and Guest," then yes, if not, we would prefer if it was just you.
Semi-Formal, please. But we want you to feel comfortable, so if those shoes are too high or that top button is too tight, let it all hang loose.