I have been following with interest all the comments about Camping's Rapture prediction on various blogs, and all of them very interesting.
I'm no Bible scholar but I think there are only three things you can say with any certainty regarding the prophecy in the book of Revelation, and they are;
1. Jesus is Lord and He is coming again, of this we can be certain.
2. We have to be ready for His coming.
3. He will take care of his people.
Anything else is presumption, or even worse, arrogance.