only salmon you can catch without guiding or hitching a ride with someone out in the saltchuck is if they open it for sockeye in the fraser. In this case you will be standing shoulder to shoulder with hundreds of people bottom bouncing for sockeye. Sockeye don't actually bite so people are "flossing" them. that is they use a long leader that catches in the mouths of the upswimming schools of salmon and the leader slides through their mouth until the hook catches in the "inside" of the mouth. If a sockeye is foul hooked - snagged anywhere but the mouth - it must be released. in the past retention has been 2 per day. If there is a commercial gillnet fishery it is best not to go for 12 - 24 hrs after as the river will be greatly reduced in #'s of salmon. in order to be succesful you need a lot of fish moving up from a flood tide. When you are fishing you will see the people fishing down below you start to hook them and the "bite" slowly works it's way up to you. people will cast way out into the river but don't be afraid to make a few shorter casts to try and locate the school path. The regs a usually single barbless hook (must have some wool on it - most people use green abut as you are flossing it doesn't really matter) about a 7-9 ft leader (unless the limit the leader length) to a swivel with a weight (bouncing betty - bring many and different sizes depending on the flow of the river - can be snaggy) then your mainline. I would use a 12-15lb leader (you need many of these tie ups as well - snaggy) and 20lb mainline. if it is snaggy you want the leader to break not the mainline and you have to be on the bottom. Keep your hooks sharp - cast a little upstream and bounce the rig into shore - if it stops or you feel a heaviness to the line, give it a pull). when casting you have to watch the guy(s) above you and wait till their line comes in to shore before casting over their line. if you hook a fish, make sure you let everyone know so they can pick up their lines - then drag the fish on to shore at the end - most fish get off right at shore.
all the best - i tend to stay away from this stuff.
as others said, it would be to your benefit to hook up with someone with a boat to get away from the crowds or get a guide (heck, it is only money!)
if your really lucky you could hook up with a spring salmon (up to 25lbs!)