With a c-clamp and a couple of pieces of wood you can clamp off the hose just beyond the removal point and you will drain almost no coolant at all when you remove the hose. You can actually buy a special pair of plier-clamps (
http://www.mytoolstore.com/sk/sk03187a.html or http://www.sears.com/craftsman-hose-pinch-pliers-set-of-3/p-00947218000P) for this purpose.