I would say that if the Wilson is about 7.5 on the gauge, the Kilchis MIGHT be at the premium level and color.
It's a guesstimate to be sure, but when the Kilchis is right, the Wilson is usually too high.
The window is often only one day.
Do not put in at the park if the K is low and clear.
You will be dragging your boat over the skinny spots and the fish will be ultra spooky.
Put in at the "logging bridge", instead.
The float from the park is relatively easy if you have some experience on the sticks.
If you've done Whitehorse, this is cake...but it could still kill you if you have a stupid moment.
On these smaller rivers especially, you have to be constantly watching out for trees that were blown down from the last storm.
Make some calls and see if you can get eyes on it before you go.
Good luck.
Edit:
As others have said above, the K is probably going to blown.
In that case, the Necanicum then the NFN usually come in first and in that order.