One of my brothers took a girl he really liked to see "The Legend of Boggy Creek" on their first date in 1972. She never went out with him again. Word to the wise.
This is basically a pseudo-documentary with incredibly cheesy music ("Hey there, Travis Crabtree," a local lad is serenaded as he travels to the home of a slackjawed yokel whose name escapes me, but not the fact that he shot off his own foot). As for the "Creature Theme," my brother and I took great delight in parodizing the lyrics:
This is where the creature goes / when he needs to blow his nose
etc. etc. etc. and other preteen humor (?).
But for your basic seventies celebration of Middle American white trash culture, it just doesn't get any better than this. Young girls in curlers, alone in the trailer with a big hairy creature stalking around outside! Cats meeting horrible fates just from espying said creature! Corn-pone accents galore! NOW how much would you pay?