User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-1758220-20110714021353/@comment-3062343-20110714022405

I think this was asked in the old Minegarde topic too. My answer would be that the base camp is placed in areas where monsters generally avoid, due to narrow passages (such as the Forest and Hills, Deserted Island etc.) or other obstacles. Although remember that in the Forest and Hills and the Snowy Mountains (probably others as well, but I can't be bothered to think of them), there are destroyed remnants of previous base camps, and the Deserted Island base camp was destroyed at the start of Tri. So the positioning isn't exactly 100% perfect. I guess that the location of the base camp may vary, moving when more monsters find out where it is.