Ever since John's remains were found I've been very curious as to the terrain they were in. I can think of so many scenarios in several parts of this case so I don't usually like to speculate but I found this video and it is probably one of the best I've seen on how the floods
could have impacted them both while still alive and after they sadly passed. This video is longer in length and the author is a bit ..idk what word to use, maybe quirky... Even so, I've watched the entire video twice and it's helped to at least highlight a little bit of how the flooding can and does affect the area as well as other interesting tid bits as he explores all the way through what is possibly at least some of the terrain John and Fang Jin also traversed. It also includes one of the hills/drops that are supposed to be one way, and from what I've read and seen watching a lot of videos of this area including this one, that rule is often not followed here, which imo and in my experience most people in the off roading community will tell you is definitely not unheard-of. ( as far as not following rules like this particular one way road) Though, in a dire type emergency I don't think most would care to follow such rule if they thought it meant saving a life either.
I also found what appears to be some sorta fencing in some areas that are not functioning well, or at all.. (ie: stakes/posts but no connection fencing) possibly from flooding? Or just meant to be markers in these particular areas, I am not certain.
Anyway, if you pay close attention to what's being said by the man and also his surroundings in the background, you may find there are also other little details there that might be useful. Including but not limited to the beautiful night sky in the area when the man in this video starts to leave the park. (I've read about and have seen photos of its beautiful nature so it was just one of many little bits I caught).
I have a shorter video I'll share with some more thoughts when I get a chance that i believe also contains some good insight as it pertains to this area. ( which seems to be somewhat popular for this region of this park) For now, I wanted to share this video, as I found it particularly helpful to myself.
Side note: this video starts off slow and the very end doesn't really have much, if any useful info so for those that may want to skip through some of it you could start at 3:50 then at the end you could skip the last 15-20 mins.