I've done it at Highfield Rd, in the Holte End at Villa Park and in the home stand at White Hart Lane. Villa definitely the diciest.
I was in the home end for our game against Everton at Goodison in 15/16, we lost 3-0 so I managed to avoid my head getting stamped on by some scouse mackems.
I went alone to Roker Park for our game when we won 1-2 and no away fans were allowed in. Was a great experience actually. Nearly let slip my allegiances when the subs were made and Ferdinand went off for Clark but thankfully Sunderland made one at almost the exact same time on the 76th minute