The kayaker might be at Beazley rock in the upper rapids? looks more like a scene from Skookumchuck rapids. If you're going Surge narrows, you might want to look at going through Beazley passage, it's quicker and safer, you just have to look out for Tusko rock on your stbd. side at the north end. And yes, you would be wise to go through Hole in the wall as close to slack water as possible. Hopefully you will have radar as August may have some fog. And have yourselves a wonderful adventure!!!