A lot of it depends on what you are in the away end for and what the stewards are like.
I go in with the home fans at away games. The last time was against Cardiff a few weeks ago. I went in with my welsh relatives. Everyone around me knew I was a Cov fan. The banter was great. Bit crap for me in the 1st half, but loved the second half. Turned around for the banter near the end of the game. Turned around to see the game just in time to see the ball hit the corner of the net

Just a shame the game then ended.
I have 2 brothers that are Fester fans. We take it in turns of which end we go in. I always sing my heart out when in with them. It is the only way we can go to games together. The banter is great.
I have a lad who is a Grimsby town season ticket holder. I was in with the Grimsby fans last time when we won 1-0. I had family and friends looking for me. They knew I was at the game. A couple of them saw me jumping around like a lunatic when we scored. When I sat back down I got a tap on the shoulder. I expected the worse, so prepared myself before I turned around. There was a row of an older generation. "We are all Cov fans but were too scared to celebrate" was the reply

That was a winter game, and their ground is about the coldest in England. I went in the stand which goes level with the water behind, which is where the cold wind comes from. The Cov fans were freezing.
I have lived as far north as I am now, and as far south as Margate. I know people all over England, and going to games with them helps me to keep up with them. ~Be sensible and most of the time you are OK. Most fans like a bit of banter. Some get wound up by you being there. I aim my banter at them.
I have got ejected only once. That was about 20 mins into a game. I went to a pub and had a few beers, then walked back to the ground and walked through the open gates to see the rest of the game. I have also been moved to the away fans end a couple of times. If you are funny with the stewards or police be expected to be kicked out and maybe arrested until after the game, then released. Unless you do anything to get done for that is. Ask for trouble and you will find it. It is nothing like the 80's where you were asking for trouble just by speaking and having your accent noticed. Not sure how they would deal with a large group of fans in the wrong end though. Good chance this would end in trouble if there are idiots about on either side. No spare seats in away end, although most of the fans will be standing, so might be ejected instead of put in away end.
If you think our fans are negative then go in with your opponents fans. All teams have their whinging fans, be it at the top or the bottom of the table. You also find out how good your own team is. They let you know.