Where do you think the best place(s) would be to hold an event?
I forget what thread it was in but for an East coast location, Asheville, NC was tossed out as an idea a while ago. Maybe something just outside of that like Brevard (or really Pisgah Forest)... Looking Glass Rock, Moore Cove Falls all a quick jaunt in a vehicle (yes, walking would be nicer, but...); not sure if anything outside of Asheville itself has scale needed to host an event though since I don't have experience with the area.
Then thinking about things that can host an event while having direct access to the outdoors, which is part of what I like from the logs I see of the original CM, I can think of two:
One option with direct outdoors is around Boone, NC. App State U in town gives the place some scale (but it's still small town), and something down near Blowing Rock would have walking access to the Glen Burnie Trail (since it starts practically in town). There are a few places in the area that can handle conference type scale. Getting in and out by air/car is a bit of a jaunt (e.g. just over 2 hours to Charlotte, NC), but doable.
If you are looking for something further north, doing something around Letchworth State Park in NY is possible - look up the Glen Iris Inn... and that's just over an hour out of Rochester, NY, so at least there is decent access by air (or Buffalo, where flying is often cheaper than Rochester).
Note in both of these latter locations are places (single company) that are mixes of hotels and cabin/suite/condo/house where the latter have kitchens, et al... so there are opportunities where part of the group can act as a form of host for smaller groups for various dinners/other meals and not having to go crazy on restaurants if there was desire to do that as part of the event.