OP, you going into a trial without a lawyer is like going into a gunfight with a spitball. Also, why would you not demand a jury? it's a hell of a lot easier for the State to convince one person (the judge) you are guilty than it is 12 of your peers from the community.
Also, there is case law that says you being at fault or not in the accident is irrelevant in a DWI trial.
This in another PSA from Ol' Doc.