So my question is who decides where these things will be and would that person/group be considerate of a Regional event, endorsed by NASSAM on the west coast?
It would have to be late spring on mid fall. No competition for the National in any way.
No one decides, and everyone decides.
FYI: NASSAM is the abbreviation of the event (North American Solstice Sky Annual Meet) and not of an organization.
There was once a time that several groups would put up bids to host the Annual Meet, and for part of that time NASSOA (North American Solstice Sky Owners Association) made the decision with a lot of input from the members of the forums. After the demise of NASSOA there were a couple of years when there was a more-or-less ad-hoc decision process on the forums and FB. Since then it has basically come down to who volunteers, and there hasn't been much (if any) competition.
There have been Regional events before, like the South East Regional in 2008, that were held far enough time-wise from the Annual to avoid conflict, so the concept isn't new and is quite workable. Some local groups hold annual events that would probably qualify as Regionals. We are actually looking at hosting a recurring meet in Lexington, probably in early September.
The question about a Regional is going to be what you plan to include in it. Vendor participation gets to be problematic because we only have a small number of them, and they may not be able to support multiple large events. Then again, large events on opposite ends of the country may help them to reach more people, so it could work out better for everyone.
I know you didn't suggest this, but I will take this opportunity to say that I am opposed to anyone planning a large meet directly opposite the Annual, although I have to say thet I don't know exactly what I would consider "large", or exactly what i would consider "directly opposite".