Northwest Fishing Reports

Hi yah fellas. My brother and I been planning on making trip on the Eastern side of Washington this summer(heard fishing a lot better over than around here around Seattle area). Now we're just thinking of camping along any banks of any bodies of water. Is there a rules on where we can set up a tent for a weekend? Is there a website rules/reg I can get my hands into SOI can educate my self with. Any info is very much appreciated. Thanks. Be safe and fish on.