GOOD NEWS!
So far I have an OK from the Executive Director of the Belcourt Castle in Newport for us to do a photo shoot. It would be for 11AM. Seems to be no charge!
They have a history of hosting car shows and seem to be welcoming to the idea. I believe they have an "L" shaped parking lot with the castle being in the background. They will also offer a tour and lunch menu. More info to follow.

http://www.belcourtcastle.org/index.html to view their site.

This is a major score for us! I have had a difficult time getting this arrainged at the majority of these properties in Newport. Seems they all think car clubs are going to wreck their lawns or something.