My guess would be that the bulk of the springs that are going above the Harrison river have done so (this is not to say there are a few streams that get later runs above the Harrison). that being said, there is nothing above the Harrison that DFO would like you to target (I.E, sockey,steelhead and those Thompson Ho's) except Sturgeon at this time, most likley till October when they will open it up for Chum and alow bait for the Jack Springs.
And of coarse with so much less river open alot easeir to police from the IDIOTS that still think selective fishing means bottom bouncing for springs (please no comments, resoning or lame excuses for said methode).
The above comments are only my thoughts and have no scientific research, and these thought do not repersent the oppinions of anyone else other than myself.
Fred....