West Coast Trip - Looking for suggestions

I'm planning kind of a possible exciting trip from April/May to... I don't know, starting from Vancouver and along the West Coast of the United States, and I'd like try to make it match with some interesting events that could happen on the way. Interesting events, to me, include festivals (music, cultural, any kind), conventions (anime, comics, video games), or anything you think it's worth mentioning. If you can think about some must-see places outside from events, don't hesitate to leave an input as well! I am already looking for this all on my own, but I thought it wouldn't hurt to seek for advices directly from native persons, or from people that would know the places pretty well. Nothing is defined yet since I am only just at the informations-seeking step now, but I think that something pretty cool could be possible

I am open to anything. Thanks for reading!