In reply to JezH: You've got a fairly similar 'full rack' to what I have, but these days I'd rarely ever take everything to the crag, let alone the onto a route. You are thinking along the right lines as the easiest thing is just to strip down what you've got. Although, longer term there are certainly decent savings to be made in replacing equipment and I'm gradually putting together an ultralight 'alpine' rack for easier climbing and mountaineering.
Neither Tremadog and Gogarth are crags where cams are particularly essential, I generally wouldn't carry any more than a single set up to 4. That is true of many other crags/routes as well. [In fact, last time I was at Tremadog, climbing VS, I didn't have any cams I honestly didn't really notice the difference.]
I try to cut back on quickdraws/extenders a lot, thanks to 4CUs (or Dragons/Demons) having doubled slings. However I do carry a fair few slings and wiregates but never more than 2 pre-rigged as 'slingdraws'. I spent many years carrying 4 'slingdraws' but have now gone to 2. On vertical cracks I am also more willing to use the old school method of just a single krab on wires rather than automatically using a quickdraw.
I hardly ever carry my microwires unless on slate or some limestone crags. I quite often strip out down my large nuts e.g. ditching 9&11 or 8,10&12.
I also pay much more attention these days to pitch lengths than I did previously. Not all E3s are created equal. For example the longest pitch on Lubyanka is only 21m, but the longest pitch on West Buttress Eliminate is 45m.
There are two recents threads it might be worth reading.
There is the 'lightweight rack' thread from March with myself, Mr Ripley and others waxing lyrical:
http://www.ukclimbing.com/forums/t.php?t=499020
When it comes to looking at what the absolute lightest gear on the market is, there is a good thread on MP
http://www.mountainproject.com/v/geeking-out-on-going-light-with-trad/10795...