Anyone who asks that question needs to talk to an attorney. As pointed out already the charges are serious and can have notable future negative consequences that a skilled attorney may be able to avoid or at least minimize. Good luck.
I suppose it depends on what the definition of "need" is. If you want to go to court and plead no contest, the court will be happy to find you guilty and sentence you without benefit of an attorney. However, a lawyer can help by reviewing the state's case for weaknesses, resulting in the possibility of evidence suppression or a not guilty verdict, reduction, or dismissal, by securing the best sentence possible for you, and by obtaining limited driving privileges. I can't imagine facing a DUI without a lawyer, but some people do it, with mixed results.