The San Josef River Heritage Park is a nice little campground just off the road and only a short distance before the Cape Scott Trail parking lot. On your way in you will be driving on active logging roads, so please use your lights and plenty of caution.
The campsite is run by Doug. The camping fees are the same as all BC Parks is charging at Cape Scott, in 2015 it was $10 per night per adult. There is a cash-only policy here.
The San Josef River Heritage Park is such a beautiful little place. There are plenty of spots to camp, most are equipped with tables and fire pits, there is no water here so bring in what you need. For dishes and washing, you can get water from the creek located on-site.
There is a good chance of seeing black bears, cougars, and more recently wolves on the north island. BC Parks is advising that dogs are not welcome in the park. I believe this has to do with the influx of wolves to the area in recent years. The only facilities in either dougs place or in the park are outhouses, I do suggest you bring your own toilet paper.
The campground is up the San Josef River from San Josef Bay, there is a small boat launch here for kayaks, canoes, and car topper boats. The river is tidal at this point so plan on a high tide launch and return. Camping at the park is on a first-come, first-serve basis.