Halfway between the Bittersprings Recreational Area and Camp guardian, near the side of a small mountain, are a group of Cazadors (there's Cazadors all over that area actually) running around near what looks like their hatchery (some open egg shaped sacs stuck to the side of the mountain). When I passed by that place I noticed a friendly unit on my compass HUD in that area, but when I went there to see what was up I only saw Cazadors. However if I tried using VATS to select the unit, the VATS would begin it's zoom-in effect, but the unit would have no name or ID and the game would immediately crash.

Just thought I'd mention this.