I did this in the early 2000s in May in a RAV4 and tent.
We drove to Port Hardy (with overnight on Sointula), and then the overnight ferry to Prince Rupert. Camped one night east of there, and did a quick tour to Kitimat (I'd read about that development as a kid).
It was rainy the way back to to PR, and didn't seem to let up for the rest of week.
We had a cabin on the way over; though it was stormy enough that I spent some of the night in the forward observation lounge. We arrived at dawn to the misty isles.
Early in the morning there wasn't much to see around Skidegate and Village of QC. Drove north the Tlell and looked at the campground there, and hiked a bit. Water wasn't turned on yet. Then to Masset, and out to Agate beach. Spent 3 nights there, right behind the drift logs at the top of a steep pebbly beach. Lots of drizzle, even a bit of hail when we hiked to the top of Tow Hill and back.
Some pickups drove on to the beach, I believe for razor clam harvesting. I drove the RAV a ways down the sandy beach east of Tow Hill. Also went into Masset for groceries and a Canadian-Chinese meal. The road out to Agate beach was quite potholed and a bit washboard.
There was a new campground at Port Clements, but we just picnicked there.
Spent the next 3 nights at Hayden Turner (Lyons CLub?) campground just west of QC village.
Took the ferry to the other island, and looped around past Sandspit, and the beaches south of there (Rec Site camping) and logging roads past Moresby Camp.
Another day trip to Rennell Sound. Very steep grade at the end.
The night before we were supposed to leave (Victoria Day) ferry personnel came by to warn all campers that there were changes in the schedule. Because one boat was still in 'the shop' the Queen of the North (yes, the one that sank a few years later) was going have to do a quick trip to the islands and then head directly back to Port Hardy. The next morning we had to break camp early and get to the dock. The trip back was bright and sunny.
We motelled that night in Terrace, and returned to Seattle via Prince George, Wells Gray and Osoyoos.
Overall the guide book that I used as accurate. Online information helped as well, but wasn't nearly as detailed as one can get now.



