You pretty much did everything right. It was a good thing that you took out the battery, that probably saved you. You probably want to try a bag of rice also. It doesn't need to be covering the computer, just put a lot of rice in a garbage bag and then put your computer on top of it (open and upside down as it was before).
I didn't read everything so hopefully I didn't miss something...
But, if you leave it like this for a couple of days and then try turning it on and it works, just keep the computer. You cheated death this once, so just don't try it again.
If it doesn't work on the other hand, send it into apple. DO NOT tell them that there was water damage. If they ask you, LIE TO THEM!!! This will not get you in trouble, but if you say anything about water, you will have your warranty voided.
You said you didn't have an apple store nearby, but if you have an Apple authorized reseller, then go to them, it will save you the shipping.
Good luck.