Riding with no GPS and Roll-Chart is fun! Where is your sense of Adventure people?
Use your ears and eyes to navigate. If you get dropped wait for the next group. If you find yourself off the front, make a skid mark at each turn so others can follow you(off a cliff).
If all else fails and you get lost....Sit Tight & Don't Panic! The good old guys from the ATR Club will find you.....eventually.