Mt Hollyburn, which I think is the cross country area at Cypress, supposedly has the best backcountry on the shore, I'm sure there's tons of stuff to do between there and the lions. Seymour backcountry is sketch, have heard it from more than one experienced person, people have gotten lost and a UBC grad student died in an avalanche a few years back. Go with someone who knows the terrain. Also, there are a bunch of books at MEC with lots of touring info for the coast mountains, very well explained (don't remember the author but check on their website).