living on the "wet coast" along with bushman5 and others here, i dont think i've ever cancelled a trip because of weather. i guess its something that just grows on ya
that being said, 3 hours isnt too bad for a trip. easily driveable distance if weather gets extremely bad. my suggestion would be something along the lines of bushman5's. take a tarp, and live under it for a while, its quite a nice experience. coupled with a fire and it'll be not so bad of a trip, you'll stay dry, and have things to do like read or whittle or practice making traps.
the point is that its a great way to relax. personally i find the drip drip of the rain off my tarp a relaxing sound.
initially you would probably get a bit wet gathering firewood and setting up your tarp but other than that you could probably get away with staying warm and dry all weekend. and who knows? while you're out there you might get a nice break in the weather and be able to enjoy a quick hike.
my personal suggestion would be to take a decent rain poncho and also good firestarters like coghlan's fire sticks. they'll make life alot easier/comfortable while your out there. a sharp axe is also a good idea to chop and split up all that fire wood
when your gathering firewood, if you've got pine in the area your in, and there are some fallen over trees you can gather pine knots which burn long bright and hot.
its wet weather days like these where it rains without too much other stuff (lightning strikes, high winds, etc), that i love having a henessey hammock. its basically its own little world where you can read, swing comfortably and sip on a good bottle of whiskey till you pass out in the hammock.
hope you get yer arse out there mate and have a good time.
JC