There are many places in BC where both smallmouth and largemouth bass populations are established and doing well. Kootenays, Okanagan, southern Vancouver Island and Salt Spring Island, for example.
In the lower mainland (region 2), bass is not found everywhere, but there is a bass catch limit of 4 per day, so there must be some areas where this fishery is controlled.
Yes, if there is bass in a body of water, might as well fish for it within the limits - but as an earlier blogger said, please do not introduce bass, or any fish species for that matter, in any body of water... This can have huge consequences on the fragile ecosystems on which many species depend...
guy