The Seekonk exit might be a good place to meet, as you suggested to me via PM. From the exit we can take Rte. 136 down to Newport. I believe the route could take us over the Mount Hope Bridge to 24 South. We could take 24 down to Newport. Tool around there, maybe pics at a mansion and park and take the Pell bridge over to Jamestown. Jamestown is a nice little seaside town. I believe there is a parking lot that faces the bridge for a photo op. Then continue on over the Jamestown bridge to Rte4/138 reststop as a farewell point. We can stop for lunch where ever and when ever we decide along that route.

The Pell bridge has a $2.00 toll.
I am still working on a photo op at a commercially owned mansion.
If we take the Seekonk exit (#1) in MA., towards Rte44/E.Prov. Using that as a starting point. It's easy to find for "out of town" members and easy access to the highway.
There is a small service road right by the exit across from the Citgo station. There is also an inexpensive Shell and Mobil in the area.