I've paddled a canoe from just north of Hope to New Westminster with no problems, and camped along the way. But, I have paddled and rafted rivers for over 50 years. I also had a map. Like others, I highly recommend NOT anchoring a canoe in moving water... even though I know it can be done. The main problem will be getting back to your vehicle drop off point. The Fraser is MUCH faster than it looks and unless you are a very strong paddler it in near impossible to go back up river to your launch site.
That said, my paddle down the Fraser was a marvelous experience. I caught trout, char and salmon all along the journey. I met lots of friendly natives, but I was always deferential that I was on their land. I always asked first before I set up camp. One group didn't want me to camp at first, but once I smiled, said I understand and was prepared to move they changed their mind. After that we were just fellow anglers sharing the water.