While not all campgrounds in Oregon require reservations, it is highly recommended to make reservations for popular campgrounds and during peak seasons. Many campgrounds in Oregon state parks, national forests, and other public lands can fill up quickly, especially during weekends and holidays. You can find information about campgrounds and make reservations through the Hipcamp website, as well as through the Oregon State Parks reservation system. Some primitive and dispersed camping areas may not require reservations, but it's always a good idea to check ahead of time.