Lots to do in this part of the country...it really depends on what you want to chase. Being in Vancouver you will be right by the Columbia river, which is a great place for carp and smallmouth bass. I basically only fish for carp anymore...
For trout, the deschutes is the best river in the state and the resides there are tough as nails. You can fishnit with a 4 wt but a 5 is probably better...a 6 is ok as well. You can crush trout and whitefish on the d just nymphing smallish (16-18) bead heads, and there are great mayfly and caddie hatches in the evenings. If you want to hire a great guide, check out chris o'donnell.
Chris has taken me down the river before and is a flat out fantastic guide...you will have a great time fishing with chris and learn a ton...tell him I said hello and he will make fun of what a trash fishing carp guy I am.
The ocean is tough. I have tried it and fishing from the beach really requires specialized equipment (sinking lines, stripping baskets, etc) but if you want to try it fish a heavy sinking line and I would suggest fishing jetties or piers. Tough to find the fish on the beach but there are always fish off the rocks...think big, heavy baitfish patterns or shrimp patterns.
That time of year, do the D or columbia warm water stuff. You would need an 8 wt for the ocean and a 6-8 is fine for warm water Columbia. 5-6 is good for the deschutes. If I were you, I would hire a guide, float the d for a day and get a feel for the water.
Best of luck,