While you generally have the right to remain silent at a DUI checkpoint, it's advisable to be courteous and cooperative with law enforcement officers. You are not required to answer questions beyond providing your identification and necessary documents like your driver's license, vehicle registration, and proof of insurance. If an officer begins questioning you about your activities or potential violations, you have the right to politely exercise your right to remain silent. However, it's essential to stay respectful and avoid any confrontational behavior during the encounter.