If you are flying a 172SP from Parafield i'm assuming you are from the Uni?
Probably too late now but i'd skip flying anything with the G1000 altogether on such a trip. Specially if you are looking to build your experience so you can get your first job up north.
Take something older with conventional instruments out to the remote areas.
I recently did so myself, no GPS, and there is definitely more satisfaction flying a big trip soley (and accurately) by your own nav calc's, maps, compass and a watch
