You're right!!!
We have also started taking FRS radios with us when we go hiking/camping. One for each member. The rule is simple, when one or more leaves the camp (gathering firewood, etc) we all turn on our radios.
We used call signs (Wolf, Coyote, & Sandman) since that tripped my 9 year old nephew's "trigger". It also insured that he remembered to turn on his radio when called for.
_________________________
QMC, USCG (Ret)
The best luck is what you make yourself!