This is pretty much the theory I’ve been running with as well.
I’d go a step further and suggest that the trigger to burn their camper and find another vehicle might have been either seeing one of those roadside signs asking for anyone with dash cam footage for the time period around LF and CD’s murders or they saw that news article with a photo of that sign when they stopped at the Jade City store and got the free coffee. They had been camping in that area for a few days, according the store owner in the the interview she did, and they thought they were home free.
They panicked. They hitched a ride with LD (since the two were seen hitchhiking bear Dease Lake), they killed him and took his Rav4, burned their own vehicle and took off eastwards.
They would have to have been complete morons to burn their camper without another ride to get away. Anyone could have come running with the sight of the smoke/flames from their camper. I’m certain they had the Rav first.
I’m also pretty certain that by the time they had become really big news and named as suspects, they were already dead. I can’t remember exact dates at the moment, but seems to me they had been named suspects on the Tuesday when they were already in Gillam and the Rav was on fire.
JMO of course.