I've camped at most of these, but in a small rig, so didn't much attention large-rig maneuvering issues.
Dry Gulch PP near Radium Hot Springs
- situated in a small valley close to the main highway. Open grass and forest. Site size seemed normal for BC PP. I used it on one trip because I didn't want to buy a Nat Park pass for the night, and had other business in the area.
Redstreak Campground (Kootenay NP - suggested good sites open
after Labour Day.
- there are, or were when I was there 10 yrs ago, 2 main areas. One with parallel slots designed for RVs, and the other with multiple loops. Not all loops will may be open in September. It is within walking (hiking?) distance of the Hot Springs pool. That walk can be extended with a loop up the ridge on the other side of the springs. Close to the town.
Whistlers Campground (Jasper NP) - same question!!
- a large flat campground. I used that 30 years ago. On my latest trip to Jasper I used the campground near the east entrance, and drove up to the hot springs. That area is better for small units and cars. Whistlers should be good for anysize rig.
Lucerne Campground (Mt Robson PP)
- The main campground in Mt Robson is laid out as a big spiral. It's flat, with gravel pads that are typical of BC parks. When I last used it, it was the only campground in the park that was open. This is close to headquarters and the trail head to the mountain.
I have used another campground on a lake closer to Jasper, but that was in June in the 1980s.
Blanket Creek PP south of Revelstoke
- typical of BC PP. Convenient when driving to Revelstoke from the southern Kootenays (Castlegar, Nelson).
Paul Lake PP near Kamloops
- haven't been here. I've use Wells Gray campgrounds when driving south from Jasper.
Premier Lake is the only BC PP park that comes to mind that I would class as tight access and small sites. This is a very pretty site east of Hwy 93 south of Radium, with a lake and nice access to the Rockies foothills. Camping is arranged in terraces leading down toward the lake.