I've been to Craven Cottage plenty of times with it being London based, know a couple of Fulham fans through business contacts and its refreshing that the visits have always been positive (though those card clacker things are very annoying!) and mingling side by side has never been a problem.
In my lifetime, Fulham have had lots of ups and downs but the supporters have always appeared to have the same outlook, whatever league they are in. It seems a nice stadium to watch football in.