Went to Leeds five times in the 70's, no problems at four of them , even the Boxing Day game when we couldn't get in. But the 2-1 cup win in 78 was definitely dodgy, being bricked and bottled as we were leaving plus a very quiet, head down walk back to the coach.
Got chased out of Wolves in 75 which again wasn't nice.
Never had any issues at Stoke or Leicester in those days.
Must admit that I tended to pick the games where there would be less chance of any trouble so the games in Liverpool, the North East, St Andrew's and London were no goes as far as I was concerned.
Went to the Swamp quite a lot in those days but the only thing that worried us about that was that some mates would recognise us and say something. Which was always a risk being a blue in Salford.