Hi, Is your father still living ?
You state that your father was given up for adoption in 1927- adopted in 1933.
If you father is still living - he may be able to obtain his adoption papers - as well -his original birth registration. which will show the name of the mother.
If Manitoba has allowed access
Do you know why your father was put up for adoption [by the mother ? by the father? by both ?
Contact Manitoba Genealogical Society - they may be able to advise. They may have transcribed the Cemetery/s -in Pine falls and surrounding areas.
There may have been local History Books published Perhaps your grandfather - the family may have submitted family history to the project.
Cheers & Good Luck, Stella