Looking for the title and author of an older book--about 30+ years ago?

small airplane pilot crashes on an island off of (?Canada maybe) and uses the pieces of his airplane to build a shelter and tries to survive. May have had a dog or made friends with a wolf...I read this in 6th grade, over 30 years ago, so I don't know how old it was at that time. All I remember it was a really well written book and a good story of survival suited for a younger person, detailed but not gory...I should remember it as I read it so many times, but.....Thanks for any ideas or suggestions as to what it might be!