For Howe Sound, unfortunately fishing opportunities are fairly limited, not because of a lack of fishing spots but a lack of fish. If you are fishing from shore, perch would be the only fish that I can think of. That isn't necessarily a bad thing, because they can be a lot of fun on light tackle.
Before I go any further on the shore fishing, a couple of things to keep in mind. In Howe Sound, there are 9 rockfish conservation areas set up and three of them are along the shoreline of Gambier Island.
http://www.pac.dfo-mpo.gc.ca/fm-gp/maps-cartes/rca-acs/areas-secteurs/28-eng.htmRockfish conservation areas were set up several years ago as an effort to recover the populations of rockfish and lingcod species, so fishing with a rod and reel is not permitted in these areas.
Beside these areas, there are also total fishing closures for rockfish and lingcod. That being said, expect to possibly see an opening of rockfish and/or lingcod retention in the summer. This is usually announced in May or June.
Now back to the fishing part, if the above regulatory information is not already too overwhelming. For perch fishing, you need a light spinning rod. Because most of these fish are between 0.5lb and 2lb, I like to use a spinning rod that is rated between 2 - 6lb test. The length of the spinning rod should be at least 6' if you are fishing from a canoe, preferably longer if you are fishing from shore. The long rod allows you to keep the fish away from all the rocks, pilings, kelp beds when you are bringing it to shore. For fishing line, I like to use 4lb test, but perhaps slightly heavier line is better because it gets scratched by rocks, weed etc when fighting perch. Perch have a tendency to deep dive and make large circles, so it's pretty often to have your line rubbed again something in the water when fighting the fish. For hooks, you need a small one for these fish due to their small mouth. Size 8 to 12 are preferred. For bait, sand worms, shrimps all work well. There are several perch species that you may encounter.
Shiner perch are the smallest ones and they are the most plentiful. The only reach around 8" long and pretty often they are a nuisance when you are trying to catch larger species.
Striped perch are pretty,
pile perch look like the larger version of shiner perch but they are in fact two different species. Both striped and pile perch reach around the same size, 1 to 2lb.
This rod and reel setup can also be used later on for trout fishing in lakes if you decide to do that in fall and spring.
For salmon fishing, because this is a non-pink year, there will not be much in Howe Sound. During odd years, pink salmon begin travelling up Howe Sound into the Squamish River in late June. This year, the only salmon species that you are likely to encounter in Howe Sound during the summer months is chinook salmon, but most of this fishing is done from a boat.
Other species that you may possibly encounter include spiny dogfish, flounders and soles. For flounders and soles, if you can find an area where the sea bottom is sandy, then your chance of catching them is very big. You just need a large enough weight to keep the bait on the bottom. While you can use the rod/reel setup for perch to catch flounders and soles, a heavier rod is preferred so it can handle more weight that you put on the line. You can use natural bait like shrimp, fish flesh to catch these, but you can also use artificial jigs. The advantage of using jigs is that you can avoid catching dogfish, which love to grab onto your natural bait when you are trying to catch other species.
Hope this somewhat helps and gets you started. Good luck.