Thanks, Wet Coast
Already identified Skookumchuk Narrows Provincial Park hike as a "must do", and we should have time to catch the best state of the tide for it (although I haven't yet identified what it should be) and hope to get up to Lund & Desolation sound.
Have just identified today that there is a music festival on that weekend, at or near Powell River but there is just so much to do we could spend all three weeks on the Sunshine Coast.
Already ideas of the Inside Passage and N. Vancouver Island are fading.
Oysters, (as long as they are cooked) and all shellfish and seafood are also high on the list of priorities.