Don't worry about it mate, better being honest rather than acting like a big man ay. You'll be alright up in Leeds, as you say it's not the 80s anymore. If you want trouble you'll find it easily, if act mature etc you'll be alright.
I'd love to go, if only I had a full-time job!
Apparently since Leeds moved the away fans from behind the goal to the side of the ground there has been a massive decrease in trouble and the home fans cant get at the away fans any where near as easily as before.