I have to chuckle at comments like "It's crowded everywhere", no, it
really isn't!

You just can't be near a major center (4hrs of less from a town of a few thousand say). Even in those confines there is some exceptional moose hunting in BC.
For the day job I get to see a good deal of exceptional moose country, and moose. Have to hold back the smirk when I hear fellows, as recently as last shift, bemoaning the declines in the area. Turns out they never got off the rivers of roads more than a mile, as there are ridiculous numbers of moose out there in regions 6 and the 7s. I was flying in region six in the fall, and zero exaggeration saw dozens of trucks, quads, boats, and side by sides doing what looked like painfully mindless surveys whilst moose were all over on small ponds deep in the trees. Even saw moose at 4,000' in the subalpine, again I presume avoiding the surveyors.
In one day here (NE BC), very typical to see a half dozen to a dozen moose. 50" is a little guy, 60" is solid and spotted a couple times a season, no pipe dreams stuff but you are going to have to travel and do a good deal of leg work. Some young guys we pointed in the right direction took a >60" and a 50" in two days. I fully believe much of the easy hunting is in decline and it makes sense, not trying to call Bologna on that. Consider doing what the guys in Ontario do quite a bit, hire a floatplane. Call Urst at Northern Rockies lodge and take a trip people pay $30,000 to do for a few grand. Get a 60" bull and a grizzly too, those LEHs are a gimme. Fishing is ridiculous too.
BC is a hunting paradise, it's just largely inaccessible by easy means and you've gotta be willing to travel. I have some excellent spots I've shared with a couple CGN friends here for moose for 50"+, but I'm not going to spill them on here and ruin it.
Good luck in the search! Can't go wrong doing the northern Rockies thing.