Smokey, I got your personal message, and I have not heard of your dealer. Since you are doing a museum delivery, the only thing to hold you back from the large NH dealership is if you want to give your business locally because you like your dealer and feel loyal. On the other hand, you will need to have your service done somewhere in CA close enough that you are willing to drive, so that is something I personally would factor into the equation as well. But you also need to consider if you want to have service done at a dealership where they may pretty much use your car as a Guinea pig. Also, I think there are special training and tools required for Corvette maintenance service.
Based on this thought process, I decided to put my order in with Boardwalk Chevrolet in Redwood City. They are one of the larger Corvette dealerships around here. My salesman told me they get about 30 cars/month delivered. I didn't ask him for proof of allocation because they have had a bunch of cars in-house every time I go there (and a new, different bunch of cars each time). They keep one car in the showroom, but the rest of them are special orders by customers that you can see through the glass window in the delivery bay/holding areas getting prepped to be picked up by the owners. When they took my order in the third week of December, they said I am #32 on the waiting list. At that number and their delivery rate, I don't expect my order to be delivered any earlier than the last of March, but mid to late April is much more likely, I think.