Urinal cakes are very tasty. The nearest bridge is at Umatilla or down at Mary Hill. This is in the middle of no where, bring food. Long reach, swell will set up for great days. Usually best in the spring.
Parking is limited but free, as are most Washington sites.
Oregon will charge for parking sites at places like Rowena and Rooster Rock. Not sure why, but this is true. Rufus, OR - Just down stream from the John Day damn. The current is swift at all times, however the swell and waves can be big and luscious. Narrow reach, you will jibe often, or at least try.