If you don't have QR's yes there will be spillage. Remove the bolt holding the tank down at the back (it's a lot easier if you take the tail off). Next lift the tank a little and place a towel ontop of the vertical cylander. Now what I do is unscrew the fuel lines and as I pop them off the banjo bolts, quickly slip my finger onto the end of the banjo bolt where the hole is for the fuel. lay the fuel lines onto the towel so that as some of the fuel escapes it's absorbed into the towel. Once you have both lines disconnected, remove the tank by lifting at the back, and sliding the front part to the rear. Shabam, it's off.. Also make sure you take some rags and shove into the bell housings of the throttle bodies (they look like silver upside down bells). That'll keep any dirt or debris out of your engine (which could be a bad thing).
Edit: Also, get the Haynes manual!!