If you guys are into Outdoor Activiaties, Bring your out door gears. Here are a list of stuff that BC people like to do during the summer Months:

Mountain Biking - Lots of Mountains and Trails here and Whistler is only 1.5 hour away
Road Cycling
Hiking - Lots of mountains/trails here
Golf - There are plenty of golf courses in Vancouver
Kayak - Can be rented out here
Scuba Diving - I can make my wife to show you the dive sites and make a day trip out of it. I am sure equipments can be arranged as well
Shopping - that's what I have been told by many people
Fishing - I don't know where, but I can find out
Corn Mazes
Firework