When they begin to walk to find their way back, Wit's X mark begins to fade a bit (only about the bottom half of the X was fading looking like a "V") and when her husband and brother-in-law stop fighting, her X mark "somehow" reappears.
Wit takes off her earrings when she is preparing to go to sleep in the tent, as she is being watched by her husband Mike's brother, Sean. When they wake up, all of their belongings have been taken, including the Neary's tent and clothes. Wit is wearing the earrings and uses them later in the truck to sew her head wound with floss.
Not true. She put a pair of trousers on when she was in the rangers station. Presumably this is where she got the boots too, although we don't see her put these on like we do the trousers.