It'll be too early for Whis. Even if it's open, it'll only be some trails, shovelled out. The Chilcotins will also be under snow. We could even still be skiing to the valley at that point. It happens some years.
The island. Go to the island. Or give yourself a gift certificate for a later date - say July or August.
The Shore is awesome. I am sure that there would be some last-minute group rides possible. Definitely buy the book by Wade and Sharon at nsmb's webshop with detailed maps for Shore rides….grab the book, some food and go exploring by bike.
The island is awesome as well, not as rugged imho, but a great scene and kick-ass trails in a forest that is still rainforest - and they know how to party. Four years this summer and I still do not drink any Tequila.
"You don't learn from experience. You learn from reflecting on the experience."
- Kristen Ulmer