If you're using the Kolsch Wyeast there is a chance you won't be able to get it to drop if you tried. It hangs on forever in my couple of experiences with it. Just rack from underneath it if you need to.
If you can cold crash it for a few weeks that will really help that beer. Not only will the krausen not drop but the yeast remains in suspension pretty much forever. If you bottle I would let them carbonate and then if you have room put them in the fridge (or maybe a really cold part of the house) to let them clear up. I love these beers though, super simple and super tasty.