Propane leaking ~ could have been the cause of that fire.
Propane camp stove is not a hiking stove , a camp bed/cot is not something you drag along with you in a Escape & Evasion scenario. My thoughts are that the guy ain’t anywhere near Big Bear.
Might have an accomplice or just figured out that being able to maneuver & move faster than the police is more important than extra rifles.
Would not be surprised if he had a high quality scanner type radio for signal intelligence ie listen in on where the police are searching & also communication between ground searchers & DHS helicopters.