Whenever devotees are driving long distances, the first thing I say when I learn of this is, "Don't drive during the night!!! Stop and rest no later than 11:00 pm. If it costs money to stop and rest, then spend it!!! Everyone should sleep at night so that there are other devotees always awake in the vehicle while the vehicle is being driven. Not that somebody drives and everyone else sleeps!"
Collected Letters to Friends and disciples Vol 4, Pg 24