This is true, but I predict that Fred will voluntarily reveal his donations, as a way to show penitence for Campaign Finance Reform, and along with proposing his alternative (no limits, full and immediate disclosure on receipt.)
I predicted this a few months back, that he would enter just after the time deadline, as if he wanted to hide the info, then reveal it in a politically impressive gesture of openness.
I hope that you're right. It'd pull the rug out from all of his opponents but good, and would show both guts and smarts.