It is accessed from Princeton, Penticton or Kelowna. You will find some links in the table below. The Gulf Islands and Vancouver Island offer more pristine environments than the areas around Vancouver itself. I am a Scuba Diver, myself, but I have to confess I've only ever done it in the tropics. I hope to rectify that situation soon.
Courses here are quite cheap.
The Gulf Islands, especially offer some of the best sailing to be found anywhere in the world. Ballooning is available from Fantasy Balloon Charters in Langley. Ave. in Surrey. Airflow Ultralight Aviation, Discovery Flights Ultralight lessons and Flights FVSC.HOME Skydiving Lessons, etc. Many companies will take you into the hinterlands for the true Canadian wilderness experience.