And are basically hunted by everyone they meet,its could be filmed in 70's or even 80's. I thought it was race or ride with the devil,but after researching it isn't..?

Soundssimilar to Race With The Devil. I'm thinking maybe Judgement Night? It's about a group of guys in a big RV off to a football game, they take a shortcut and witness a gang killing, then crash their RV.