You are looking for a micro, with only enough room for a log book. A TOTT should be with the cache, but if not, you might need tweezers. It can NOT include a writing tool. Please use some stealth, as you might imagine, the area can be busy from time to time, especially during flight times. You'll probably be in full view of those who have been (im)patiently waiting for the door to open and the stairs to drop so they could get some... um, fresh ?? air.
As of July 4th 2019, you might actually see two geocaches at this location. The original, if it is in place, is not under the stairs but is inconspicuously attached to them. It isn't BOLTed on, but rather is magnetic. The second cache was placed with ziptie underneath the stairs. If you sign either one, that will be fine. If someone can verify that the original cache is still in place, could you let me know please.
A word of WARNING, though. When you come, please plan to come "old school", with a proper GPSr. Smart phones will now (as of the summer 2015) work in Kugluktuk BUT ONLY if they are connected to the Bell system. But a GPSr with the coordinates loaded will definitely get you to GZ.
If you're in the right place, you'll be able to see, off to the north north east, part of the Coronation Gulf. You'll also be in full view of muggles, in all likelihood.
Congratulations to gypsy+ on their FTF!