"I guess somewhere in the basement of the Smithsonian there is tons of proof of evolution but they don't want to show it to us just yet."
The "proof" is in any basic biology or paleontolgy text.
Its hard to take the Bible out of the argument as most people who object to evolution as an explanation for the origin of complex life base their opposition on the belief that Evolution somehow contradicts the Bible. I don't personally belief that as I am a Christian, believe in the Bible and believe in evolution. Where I part ways with atheists on evolution is that they explain the chain of events that led to modern man as a series of fortuitous accidents. I believe these so-called "accidents" - like the very rules of evolution themselves - were directed by the Hand of God.
I suppose there ARE some people whose opposition to evolution is based on other issues, like disagreement with the facts as presented or interpreted, but I beleive they are in the minority.