Never having been faced with that situation, I can't say for sure what I would do with absolute certainty.
But.
Right now, sitting right here, not having to face such a decision except as a thought experiment I would say that if I were sure of my innocence, I wouldn't consider it a risk. If I were innocent, I would go to trial and expect to be exonerated.
Assuming 20% of innocent people get convicted are you willing to risk the rest of your life?
I've only known 3 people who've been to jail and 2 of the 3 was innocent. Not in a they maintained there innocence way. But in a there was proof they were innocent. They just weren't able to get a hold of that proof until after they were convicted.