Washington Event & Road Trip

So A crew and I will be venturing from Cali To washington for the upcoming NWWA event at Lake Samamish with my Enzo. We are planning a 3 to 4 day road trip back and are trying to map out our way so as to stop at as many local and major riding lakes and rivers. Does any one have good ideas of where to stop?? Basically between Lake Samamish and Stockton california. Thanks for help.