Hey dude, it's probably too late but I thought I'd let you know that, if I remember correctly, I did just loosen the bolt and did not remove it completely. But I can't swear to it. But I do remember it being super tight.
One thing I did dude was attach some rubber hose (I happened to have some laying around that was the perfect size to fit) to the little drain tube and routed it to my drain pan. No mess.
Well, no mess until, while refilling the coolant with the engine idling, the radiator overflowed and the anti-freeze spilled onto the moving fan and sprayed coolant over the engine, me, and the fenders.:headbang: