We would have quit at the half-way point where you can escape, but the weather then turned great. If you can go when tides are extra low during the time of day you're hiking, then a flat sandstone shelf emerges from the water and provides easy hiking after a few hours drying (we got only a taste of that).
Still, the rain forest life was amazing. Every tree covered in moss, and often with ferns and huckleberries growing out of any tiny crook. It rivals (or according to wiki, exceeds) the amount of life I've seen in tropical rain forests.
If you go, get the tides right and go in July or August, probably. Or be in incredible shape. And bring one or preferably two hiking poles, and a backpack cover to protect your pack.
I'm happy to talk to anyone who's interested in more info.
UPDATE: Forgot to mention our visit to a British Columbia parliament session in Victoria, which was memorable. Same left-right issues, but in a different and more raucous context.