My family used a white board (with magnets on the back) with four columns, one for each person. We hung that on inside of the door...Then we used a sticky notes pad and pre-made some popular locations...stuck them above the white board...added many blanks too...and included a marker tied with string. Each person was supposed to move a sticky note under their name to indicate their location. Yup, had to return to the room but it made it easier to connect with each other...
YMMV