I've driven logging roads in the Charlottes, ferrying sea kayaks up top, in a small pickup, quite a bit. Expect a dust/mud bath, with some chance of the odd rock pinging the windshield, with consequent ding. If you've driven the road to Bamfield out of Port Alberni, you've had an experience similar to what the roads in the Charlottes have to offer. Some boaters on the latter shroud the bow with a protective cover (bow bra) to reduce gel coat chips.
Log trucks in BC are enormous, half-again-wider than log trucks in the states. And, because thoe roads are truly "private" roads, owned by the timber licensee, they run hard and can be intimidating. But, they are not out to run you off the road, although at times it might seem so. Now and then, they do not want you on specific sections.
The comment about "big radios" is accurate. Some VHF's (my ICOM M-88 handheld, for instance) have the capability to TX/RX on "land" frequencies, once you get the necessary HAM license. If you truly want to talk to those guys or listen to know when they are coming, I bet you could find out what frequencies they are using and dial those in. Somebody here must know more about this.
That said, I would avoid towing my boat a lot on those roads, just because of the rock dings, and wear and tear on the trailer. I won't tow to Bamfield, for example. I can run down from Port Alberni, on 30+ miles of inlet, and have a better experience, from a good launch ramp, in lieu of 50 miles of logging road and a sketchy ramp in Bamfield.