part of the USA living in the stone age in 1988?

Im watching this movie right now on netflix, im 17 minutes in and i couldnt help myself but pause the movie and come here write a few lines.

First thing first im am not from the USA, but to my knowlegde in 1988 there were no part of the usa still living in the stone age lol, i know what a hillbilly and a redneck is but this was push to another level completly i mean, when theses city kids first show up, one of them tell another one not to take a picture of the guy on the side of the street by fear he goes apeshyte and try to kill them, then once they get to the store, there is this old guy that show up to the store with is old pick up from the 30's with his 4 or 5 kids in the back of the truck, they are all clothed in rag,i think even one or 2 of them didnt have shoes, missing teeth, have dirt all over there faces and all seem to have skipped a shower or 2 to stay polite. then, the few non-douche city kid start taking pictures( like some inconsiderate or inexperienced tourists do when traveling in countries from the 3rd world) of them and talk to them like they are retarded, and one of the kid ask the woman what she is holding, OMG, the kid doesnt know what a kodak is.........17 minutes in and its already over the top ridiculous..cant wait to watch the rest of this flick!