Plausible, and good theory but a couple things why it doesn't add up for me:
I wish we knew if LF carried a firearm (I might've missed this info if he did have a gun). LF doesn't strike me as the type to carry one though, I think it's hard to get firearms over the Canadian border too(?)
I still think they could've flown under the radar much easier if ditched their truck in the bush or drove off a ravine, lighting it on fire drew attention to them so I have to think they wanted the notoriety, JMO.