Delaware is enviably located in the middle of the country;"
Yeah, but what country?

I don't know where you guys got that climate zone map. It appears to use a different system than the Western Garden Book, which is as far as I know the real authority in the west. See the reviews on this page:
http://www.amazon.com/exec/obidos/ASIN/0376038756/ref%3Dnosim/teijn-20/104-2081885-3531159Here are their zone maps:
http://www.sunset.com/sunset/Sponsors/Garden/sunsetmonrovia_r1/htmlfiles/zone_map2.html#As to the total population vs voting age population, I did not mean to say they were perfectly redundant, just that they are close enough that if you are going to pick only 3 criteria to look at, you might find another one a little less tied to the other two. In math terms, you've chosen 2 independent variables, not 3. Of course your choice of variables will certainly scramble the list, so I'm not sure how scientific an exercise this is.

I'm against sending a letter (unless convinced otherwise) to governors, Chamber of Commerce leaders and the like.
Think of it. Every FSP member gets one little vote about what state we go to, but you are giving governors a veto over the choice all of them make (in effect, anyway). Why would you trust a governor, or a chamber spokesperson, with that much power? These may be the last people we should listen to.
I agree we should hope to find a state where we will be welcomed, but that has little to do whether a particular governor welcomes us. We need to find this information, but let's be a little more creative about digging it out.
Actually, I can't think of a reliable way to do it, at the moment, but I'm pretty sure asking the governor ain't it!