I am not a Tapanila, but my cousin, one generation removed - Doug Kemila, was married to your grandfather's sister Jennie Elva Tapanila. I grew up on a farm near Dunblane Sask, Canada that was only 2 miles from where your grandfather Arvid was raised. He was born near Perth North Dakota on September 11, 1907. I knew Arvid and Martha and your uncle Jack when I lived in Saskatoon in my teen years. I also met your father Dan at that time (1960's).
I have been developing my Maunu family tree for 18 years now and have a branch belonging to your Tapanila family going back to your Great Grandfather, Jacob, who came from Pyhäjärvi, Finland. By the way Arvid and Martha did not come from Finland, rather their parents emigrated to the USA from Finland in the 1800's and then moved to Saskatchewan in the early 1900's.
You may check out my family tree info with your Tapanila connection by visiting my website
http://members.shaw.ca/maunu/home.htmlP.S.
I also live in BC, North Vancouver
e-mail:
maunu@shaw.ca