The trip you're planning sounds great. I have skim read many of the posts and the info all sounds good. Here is a bit more info (if you need it):
- Route 3 across the southern part of the province is fantastic. Beautiful country, good highways, (a few long climbs) but all do-able.
- West of where you enter the province, very nice Provincial Campground at Rock Creek in the Kettle River Valley. BC Parks are reservable in the summer (not necessary in the fall?) Website https://secure.camis.com/DiscoverCamping/
- Continue over the mountains into the Okanagan Valley driving into Osoyoos. Beautiful arid climate. Wine growing region up as far north as Kelowna (1.25 hours). Camping in Osoyoos check out N'Kmip Osoyoos BC, British Columbia Canada | NK'MIP Resort
Easy to spend several days in this area if you like wine or enjoy this kind of lakefront, fruit growing region. Also visit Thompson Okanagan Tourism Association - Home - www.totabc.com
for more regional information.
- Heading west again on highway 3 you will go through Keremeos an orhard and fruit stand area. Nice camping at Hedley 30 minutes farther west at Riverside (private) campground or Stemwinder Prov Park campground.
- 1.25 hours farther West is Manning Park. Fantastic coastal mountain camping in nice weather. Gets pretty rainy though. Favorite campground is Lightning Lakes. (Dump station in Manning Park - I say this because some of the smaller Prov Parks don't have dump stations and this is one of the last ones on your way into Vancouver that I've found) E C Manning Provincial Park - BC Parks
- From Manning Park you are only about 2 hours from Vancouver. Lots of camping in South Surrey/White Rock (on the US border at Blaine WA). Hazelmere Campground is a couple miles off the main highway but very nice private campground. From here its a 45-60 minute drive into Vancouver city center.
- You will have to do more searching for camping in or near the metropolitan area of Vancouver. Maybe Capilano RV Park near the Lions Gate bridge?
- Ferries to Vancouver Island are no problem at all. We have taken our trailer over a couple times without any incident. $200 each way (or so) car, trailer, driver, passenger. Cost is based on total overall length. Definitely reserve your spot in advance (1-2 weeks) and don't miss your ferry! BC Ferries - British Columbia Ferry Services Inc. - Experience the Difference
- Vancouver island - Rathtrevor Provincial Park in Parksville - beautiful as mentioned. Also private place called Park Sands RV Park in Parksville. Quiet in September hookups etc.
- Southwest end of Vancouver Island in Port Renfrew - fantastic out of the way campground. Maybe a little closer than Tofino? Beautiful location. Fine to take your AS to.
- Haven't camped at Tofino, but as noted by others you may want to reserve in advance. Summer is crazy. September is much quieter. Stunning location.
Just wanted to fill in some details especially on the highway 3 portion. Some of my favorite camping ever along that highway. Also central Washington along the Columbia River valley is fantastic. Places like Leavenworth (not quite in the valley), Wenatchee, south to Yakima (wine country), then farther south to Oregon along the Columbia River west out to Portland.
Anyway - enough info. Have fun!