For the purposes of this article, the Olympic Peninsula region consists of Clallam, Jefferson, western Mason, and Grays Harbor counties. The eastern part of Mason County, including Allyn and Union, is covered by the Kitsap Peninsula article.
If you are not with tour coach, it is strongly recommended that you hire a roomy, good quality sedan, SUV, or minivan upon arriving in Seattle. Driving around the peninsula is very enjoyable but can involve long distances.
Be mindful of the time of day particularly in early summer. Restaurants in remote areas may have limited hours of operation, and reservations are recommended where available.
If traveling by car, consider packing a picnic basket as a contingency measure.