You are in for a delightful trip.I have travelled all the routes as I lived there.I recommend the'milk run' if you like island hopping.It's called the Gulf Islands route and takes you to 3 different islands,all of which you can debark ,camp on and catch the next one.Salt Spring Island is the last and largest (22 mi.longx4mi wide).and has a wonderful art community.One of our forum members lives there (fulltimer).You cn then get one of two ferries off to Vancouver Island.(Ask for the "through fare"-think it's cheaper).Salt Spring has a website-do a search.
Also if you want to get from Victoria to Washington state you can do so on the Black Ball Ferry.There is info on their website.The Olympic Peninsula is a great visit with some beautiful rainforests and mountains.
One more thing-B.C. has gov't owned campsites that are exquisite and in the most beautiful settings.I believe they are first-come basis,but you should also be able to find a provincial website-try BeautifulBC.com or a search.