Whadya mean "one group"?
If the river gets closed for ANY reason it can be categorized as being because of some one "group" or another. During my 45+ years of fishing the Fraser pretty near every group has been the cause of a closure: commercial over fishing, forestry, recreational fishing practices, train derailments.... Please don't inferr that one particular type of tackle is detrimental to the whole Sockeye or Coho population.
Even if there were 1,000 Rec. fishers out every day, for 2 full months, and we each took home a fish EVERY DAY, that's only 60,000 fish! Two fish a day, EVERY DAY would still only be 120,000 fish. 1 well run hatchery can easily replace that.