Rovers love going there. They get quite excited. I think it's an opportunity for them to feel "big," to feel like big boys with the safety in numbers of 2k, a chance to puff their chests out and congratulate themselves on their "massive" following. And not get (much) of a kicking/maybe give a few locals a kicking, should numbers be in their favour.
Perhaps being kind you might call it "enthusiasm," something we ran out of years ago, certainly for trips to places like Walsall /the West Midlands.