Enforcement between Osoyoos and Rock Creek? Aye aye aye, that's a sad day. I travel Highway 3 to Christina Lake 8 -10 x a year and I have never seen a single officer in the last five years on that stretch. Based on my observations, the Osoyoos detachment stays in town and the Midway detachment I don't see, period.
The only place I've ever seen specific speed enforcement between Osoyoos and Grand Forks is in Greenwood, enforcing the 50 or 60 zone.