For activity suggestion, I’ll call out the AACA museum   https://www.aacamuseum.org/

From what I understand, it’s one of the top Automotive Museum in the country 

It’s in Hershey so a bit farther of a drive then typical (unless folks know of things along the way). If too far for the official gathering, I’ll plan to hit it on the way in or heading home (assuming dates work for us)

We, like Dave like cruising the back roads. That was the reason for the Poconos. Any time is good, as long as it doesn't interfere with registered events. 

A Sept date could work for me.

The wife and I love the area.   Some places to visit that are fairly easy walks are Grey Towers, Kittatinny Mountain, Dingmans Falls, and Buttermilk falls.   Bushkill falls are little more strenuous but not terrible.  I recently found photos of a road just north of there called Hawks Nest.  I'd love to take the Vette for a cruise up there.   

September would be best for me for various reasons, including...Bonnie does not have AC.  I am game for any activities.

Friday is typically a longer driving day so it could work as the morning activity, grab lunch someplace nearby and stop at another venue part way on the return trip to the host hotel.  Just a thought.

Starting to seem like September is the preferred month.

I know we should avoid the weekend of the 16th, because of MAM Corvette Funfest weekend.  Any other dates we should avoid?

Labor Day weekend obviously, as it's the unofficial end of summer and it will probably be quite busy in the area (shoulder season prices usually kick in after it).  Picking either of the weekends before (the 9th) or after (the 25th) MAM Funfest might be too close for folks planning to attend it (have heard it's going to be quite the blowout!).  But on the flipside it might be an advantage (coin toss?).  Going too deep into the month venues may start closing for the season.  For folks coming from the west early winter weather could also play into traveling through the Rocky Mountains.   Oh, decisions, decisions...!!!   🤣

Not necessary to bring a Vette! Just bring whatever you are comfortable with. 😀

I have been looking at the dates of September 27 to October 1. during this time frame the leaves will be near full color, an added benefit. That time frame may have an effect on some of the activities but the effect will be minor.

I think late September early October would be nice.