I have a few suggestions for some smaller airports in Northern/Western Canada:
Fort McMurray, AB (YMM) - Metro Pop. 66k - Airport traffic: 600k a year
Kamloops, BC (YKA) - Metro Pop. 100k - Airport traffic: 275k a year
Prince George, BC (YXS) - Metro Pop. 86k - Airport traffic: 430k a year
Grande Prairie, AB (YQU) - Metro Pop. 63k - Airport traffic: 435k a year