CrashBand wrote:I don't think it's trying to be realistic...?
Yeah, it wasn't meant to be lol. The movie does what it set out to do, tell a Hollywood-ized version of the story and make it seem cool.
But in regards to the OP it is fully possible. It takes strategy like others have said as well as knowledge of the area around you. A big part of why they withstood so long was simply knowing the area and using it to their advantage.