Regarding the disparity in news items, such as "money" morphing to "change" in the description of what came out of the RAV4, one factor is that some media outlets simply change the wording of another outlet's story and post it as their own. My rule of thumb is to take everything with a grain of salt.
I'm still wondering if the suspects hopped a train. I might be tilting at windmills, but I can't get over the fact that the RAV4 was reportedly found close to train tracks, in probably the only such convergence for hundreds of miles in any direction.
On the other hand, I find the theories that they could still be hiding in the brush in the general area, in spite of all the searching, quite plausible. Even dodging thermal-imaging aircraft would not be overly hard; they can hear them coming. It's even easier if they are near any form of cover whatsoever, including logs, rocks, and embankments. It would be easier still if they have one of those reflective survival blankets (mylar), often carried in cars (I keep several in mine). Many times, searches for lost people who want to be found have had great difficulty, so I can certainly understand it being very hard to find people who don't want to be found.
I'd also like to point out a misconception being spread by the press; York Factory. They have been conflating it with York Landing, where the Bear Clan sighting was. York Factory is actually a long ways east, very close to Hudson Bay, just south of the mouth of the Nelson River. So far as I know, it's a ghost town.
An interesting factor is water. Apparently, "beaver fever", more properly giardiasis, is said to be an issue with untreated water there. Unless the suspects took water filtration or purification pills along, they may well get it. I've seen quite a few saying that this would preclude them lasting this long. That's not quite so; infection onset is generally 1 to 3 weeks. Also, the majority of people drinking backcountry water untreated don't get it. You can also make a pretty effective filter from a few layers of cloth if need be. So, my guess; with a few supplies, plus if the berries are as plentiful as I've seen in other areas that far north at this time of year, they may well be just hiding well away from any passable tracks.
My guess is that if they are caught, it'll likely be due to raiding unoccupied (even for a few hours) properties for supplies.