Well, I don't know, but the first 2 episodes I watched I thought they were not carrying enough gear, but hey, they were only going out for a short spin before going back home to sleep! Little school book back packs is what I saw, don't know about the rest of the episodes!
When I go out anywhere, (I been in jungles, I been in deserts, and I been in mountains both wooded and rugged), I ALWAYS carry my old Army LARGE RUCKSACK that I carry all my equipment in, plenty of drinking water, (usually 4 gallons), water purification system, fist aid kit, sleeping bag, tent, at least 4-5 MRE's, (2) 50ft rappelling ropes, climbing and rappelling equipment, carabiners, etc., (not the cheesy store bought brand rope but Army rope), fire starter kit to include steel wool and 9v batteries, 3 flashlights, extra clothes, 2 firearms, (1 pistol and 1 high powered rifle with 100 rounds of ammunition for each), gold pans, picks, hammers, and axes, amongst other stuff I may put in there that comes to mind, (that I hadn't mentioned), on what I may need. My back back usually starts out at 80lbs with everything I carry and I do it with no problem. Now if I made camp and venture out for a few hours, I will have about 50lbs of gear with me even when just going out prospecting!
I don't know about your first post you made here, but I have opinions about the show like everyone else has about the production of how it went down, but I can probably guess these guys on the show are no dummies just the producers and directors are!
