aterpster
My knowledge of the geography of the area is not good but news reports say the aircraft came down near the settlement of Resolute Bay. Looking on Google maps satellite view confirms that this small town is to the south east of the airfield / runway. In that case, seems unlikely that they would have been flying the ILS back course procedure for RW17.
Further information taken from the The Aviation Herald website :-
The crash site is located less than 2km west of Resolute Bay Community in rugged terrain.
A listener on frequency reported the crew of C-GNWN had called 3nm final for runway 35T, which proved to be their last radio transmission. Temporary Tower tried to raise them without success. Another aircraft was on approach to runway 17T and went around because of fog, they were asked by tower whether they could see anything. During their second approach the fog lifted and the crew of that aircraft was able to see a debris field and black smoke at the top of a hill
CYRB 201900Z 15008KT 8SM VCFG OVC006 07/06 A2985 RMK SC7 VIS N-E 3 FG TOP OF HILL SLP113
CYRB 201800Z 19008KT 10SM VCFG SCT003 OVC010 07/07 A2983 RMK SF3ST5 SLP108
CYRB 201700Z CCA 20007KT 10SM VCFG SCT002 OVC009 07/06 A2982 RMK SF2ST6 SLP105
CYRB 201649Z 18013KT 5SM -DZ BR OVC003 RMK ST8
CYRB 201600Z 18008KT 10SM -DZ OVC007 06/06 A2981 RMK ST8 SLP100
CYRB 201533Z 17008KT 5SM -DZ BR OVC006 RMK ST8
CYRB 201500Z 18016KT 1/2SM R35/2200FT -DZ FG VV002 06/06 A2979 RMK FG8 SLP095
CYRB 201450Z 17013KT 5/8SM -DZ BR VV002 RMK FG8
CYRB 201434Z 17016KT 15SM -DZ OVC005 RMK ST8
CYRB 201400Z 16014KT 15SM BKN009 OVC070 07/06 A2979 RMK SF4AC4 SLP094
As said previously, not great circling weather IF that's what they were trying to do......