I think your dialogue is fine. From what I have read, dialogue is one of the most difficult things for a writer to express on paper. Mark Twain comes to mind.
I caught the fundie thing too, since nobody in this part of the country would consider a Unitarian a "fundie". Except for Wild Bill, I suppose. 
You know, sir, Tanker's comment motivated me to try to improve, on this dialect thing.
I have to go to the hospital w-a-a-a-y out in the Sandhills for a post-surgical examination tomorrow (Saturday; it should all be good, because nothing out of the ordinary's happened), but then sometime over the holiday weekend, I'm going to do a new story, where the primitives stalking franksolich go to a flea market up here on the roof of Nebraska.
This is going to be doubly difficult, because besides working on dialogues, I'll have to deal with the "flea market" culture, and I know as much about flea-markets as I do about breeding silkworms.
Flea markets of course are a part of the popular culture, but I never paid attention to them.
I look at it as a challenge, putting together a credible "picture" of the primitives at a flea-market (while stalking franksolich, which goes without saying).