Also a little bit late to the party. I only watched this for the first time, about two or three years ago ... I caught a Christmas episode, which I LOVED, and then I watched all from the beginning on iplayer.
It's absolutely brilliant, and one of the best sitcoms ever IMO.
I LOVE it when Smithy and Gavlar are singing 'do they know it's Christmas?' at separate ends of the town! (Whilst on the phone together.) And I love Nessa so much. Oh! Oh! Oh! Also (to her son when he's about ten,) 'Neil! Neil! Neil! NEIL! Oh Neil, Oh, Oh!' and he ignores her. Then she says 'Oh! Neil, the baby!' and he turns around. 
And what DID happen on the camping trip???
Also..... SPOILER ALERT * DON'T scroll down if you have never seen it and want to watch it/have only just started watching it!
I do feel a bit miffed that we were left hanging when Nessa said 'I luvs you I do Neil' (to BIG Neil - Smithy) and asks him to marry her, and he doesn't answer, and I don't think we ever find out what happened as that was the last episode, and they didn't make any more. 