Shuggy...did you take the photo of the fishing hut? Except for that horrible yellow mailbox, it's a great pic. Regarding the discussion on the age of that sign...it has been around for many, many years, and I'm going back to at least 1950. I remember seeing them in No. Carolina as a wee tot, when I accompained grandpa to fetch the cows home from the pasture. Hillbillies (and they aren't just from Arkansas!) had them all over the hills, primarily to keep "revenurers" from finding the stills....for those of you who do not know, a still is a contraption used to make illegal alcohol, called "white lightin'" and other names I can't recall at the moment. Stills were hidden deep in the woods, or underneath the house, particularily the henhouse, and usually only one or two members of the family knew it's whereabouts to protect it's whereabouts. I still have cousins (and in the south, almost everyone in "the hills" is a cousin to everyone else) there, and I've had a taste of the liquor. But I digress.......
The license plates don't bother me at all as they change all the time. In California, there are newer cars using ancient plates, and with all the designs supporting various groups/organizations, one could spend a lifetime trying to figure it out. I'm sure Lee knew the license plates would not be a significant point of interest (I guess he never figured some of our posters would figure it out sooner or later).
The vintage of the trucks is not really a noticeable point, except to those who are into that kind of trivia. I remember reading a post somewere by one who really got over-excited because the truck Ennis gets out of at the beginning of the movie is, apparently, newer than the time of the scene, 1963. But if you know nothing about truck year models, I don't see where it becomes an issue.