I usually change my oil at very quick for synthetic oil intervals. Tupidly quick some may say, but it gets saved and then goes into my run about pick me up, an old Mazda B4000. So no loss of funds so to speak, for the cost of my oil in the bike ....that's how I look at it. Sorry for the long winded explanation...........Last summer, well two summers ago since this past one just ended , I went across the country and as far north as possible. I only changed the oil once in that distance. That was maybe 6- thousand kms per change. Both times it was as close to black as one would expect. So for your trip up the James Bay Road, I wouldn't sweat it much.....just change it before you leave and again when you get home if you so choose.
Hope this helps