I wouldn't risk it and I would go ahead and use the K&N "Filter Recharger Kit." K&Ns are obviously expensive and I wouldn't risk messing one up. The K&N kit (soap and oil) is only around 10 bucks and you can get it at any good auto parts store. Besides, I don't believe that you can even get just the oil or just the soap, if ya get the oil you're gettin the soap so ya might as well use it!
With the drying...the only way I have done it is to just let it sit there for a while...doesn't take too long. Just time it right. When you come home for the evening and you know you're not gonna go anywhere, wash it then, let it sit either for a few hours or even overnight, spray some oil on it in the morning, throw it in and go. That's my take on it