No one likes talking to police, for any sort of criminal defense or questioning, including DUI. You have both rights and responsibilities, regardless of the crime being investigated. It's important to get a lawyer on your side.
Identification? Not Necessarily
Many citizens don't know that they aren't obligated to answer all police questions, even if they were driving. Even if you do have to prove who you are, you usually don't have to say much more about anything your plans or what you've been drinking, in the case of a DUI investigation. These protections were put into the U.S. Constitution and have been verified by the U.S. Supreme Court. You have a right not to testify or speak against yourself, and you can almost always just leave if you aren't being detained or arrested.
Even though it's good to have a basic education about your rights, you should hire a legal advocate who knows all the small stuff of the law so you can protect yourself reasonably. Legal matters change regularly, and differing laws apply jurisdictionally. Find someone whose main priority it is to know these things for your best chances in any criminal defense or DUI case.
Usually, Talking is OK
While there are times for silence in the working with the police, remember the truth that most cops only want peace and justice and would rather not make arrests. Refusing to talk could cause problems and make your community less safe. This is another reason why hiring the best criminal defense attorney, such as criminal defense lawyer Portland OR is wise. A good attorney in criminal defense or DUI law can help you know when to talk.
Question Permission to Search
Beyond refusing to talk, you can deny permission for the police to rummage through your house or car. However, if you start talking, leave evidence of criminal activity in plain sight, or submit to a search, any information collected could be used against you in future criminal defense proceedings. It's probably good to deny permission for searches verbally and then get out of the way.