The Master Surname Index (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists some 11 McHARDY names but none in the Wainwright area.
Did you try the Phone? http://www.canada411.ca/
For further research please contact the Research Committee of the Edmonton Branch.http://abgensoc.ca/
The Edmonton Branchhttp://www.agsedm.edmonton.ab.ca/