The War Diaries will either be at DHH (Director of HIstory and Heritage) at NDHQ or at the NAC (National Archives of Canada).
http://www.cmp-cpm.forces.gc.ca/dhh-.../index-eng.asp
When I met Stanley Fields, he gave me a small-sized privately copied set of the 5th Fd Coy RCE's War Diary. The entries are interesting reading depending on the quality of the author's expression. Author Prof. Terry Copp had full run of the war diary section at the NAC for his series of book entitled (coincidentally enough) 'Maple Leaf Route'.