Like a lot of words, "redneck" and "hillbilly" can be derogatory depending on context and who is saying it or they can be a literal compliment.
I personally embrace my inner redneck (I do think hill billy requires a home topography I can't claim), but being Cajun, it's kind of hard to feel insulted by anyone attempting to disparage a heritage.
To the OP 2 observations.
1) Use I-20 to keep it simple for your Yankee friends (they probably need it).
2) I'm fairly certain you can't claim either having voted for Hillary. You could claim to be a "progressive redneck" I suppose.
Or hillary-billy