My son went through SERE school with a group of Army Rangers and a couple of SFOD-Ds (Deltas) (this school was conducted at Fort Bragg) while he was in the 160th SOAR. He described it to me in detail. Very interesting, but not as challenging as his 160th Green Platoon experience - one that included requiring all newbies (officers and enlisted alike) to crouch for 8 hours in a 55-gallon drum full of water, with only his nose sticking out of an opening in the lid to breathe, and run the gauntlet while cadre threw punches (they broke my son's nose during the gauntlet even). The 160th guys were a fun group.
While stationed on Mindanao, PI in 1970 we routinely received requests from Clark AFB (500 miles north on Luzon) to gather local critters to re-populate the jungle survival school (a SERE type school tailored for jungle survival for the pilots and flight crews inbound to Viet Nam). So 3 or 4 times each year we'd have the locals bring their jungle critters - lots of big snakes, monkeys, lizards, etc. stowed in wicker baskets - and we'd load them into our duce and-a-half and haul them to a waiting C-47. Those flights back to Luzon were very unpopular with the flight crews. In the meantime, there was nothing funnier than watching a local walk his pet lizard on a leash - just like walking a dog - to our detachment.