Good morning folks.
I find the Split Lake ferry option unlikely on the surface for these two to get to York Landing. They may have made it back to Split Lake and gotten on the ferry before they were named as suspects, but that ferry is so small, surely the operator would have noticed these two lanky outsiders. In the days since, with LE and police swarming Gillam, questioning gas station workers in Split Lake, etc., the operator of the ferry would have said something to someone about these two.
Unless that third-party, non-supportive theory has legs and they were hidden in the bed of pickup under a tarp or something along those lines.
I think it more likely these two somehow managed to walk their way from Gillam along one of these old trails/hydro lines, whatever and stumbled into York Landing desperate for something to eat beyond cedar bark.
If they did walk, and they still have some energy, how long until they stumble into someplace like Kelsey approx. 30 km to the west?
JMO
Not long I'm afraid