You get there early {usually a day or two} and anchor for position, if say Johnstone Straits is opened then you will have boats here there and everywhere anchored up in their favorite haunts like always, and usually the first set in the morning is the best as the fish aren't scattered yet, but only if your in the right place at that givenb time, it's a crap shoot most of the time, but on certain tides with fish in the area it's usually a given that you'll get some decent sets. After the first few morning sets the fleet scatters somewhat, looking for jumpers and so on to set on, while some stay put and work the area their at all day long top save on fuel etc etc.
No way in hell would the fishermen be happy if they had to go at different times, first is best {usually} unless ALL the fleet is only alllowed one specific spot and you get the draw for the best tide {which is not always the flood either, some places where the tide backs up is best}. That would not work at all so the way it is is best, open a certain area, let them fish, nut have cameras showing each and every piece that goes in the fish hole, and every piece that goes over the side.
In all the years I seined {over twenty} I can say that when we fished for sockeye, we caught sockeye, the pink by catch was very small, and the same when we fished for pinks, thew sockeye by catch was also very small, as the runs basically determine what was there at the time. What people saw on TV was not a lot of by catch, even though a lot on here will not agree, it wasn't.
When seiners fish pink salmon they basically need a boat load to make a buck as they are only paid maybe 25 cents a pound as opposed to dollars a pound for sockeye.
When I fished, every sockeye that came aboard was a dollar in every mans pocket, and every pink that came aboard was a quarter, pretty hard to make a buck fishing pinks, but when you got 25,000 lbs of sockeye for the week then it was a 25,000 paycheck as we were getting a buck a pound back then and only now do they give the fisherman more per pound as they only give them so many times to fish, not a couple straight months like before. We'd fish out of Rupert for 5 weeks at the start of the season then come back down here and fish a good month and a half until it was time to fish for fall dogs {chum}. Now the licenses have all changed and that doesn't happen any more unless your boat has a double license and i don't even know if that's allowed anymore, ??