My prefrance is for continuous dripping during daylight hrs and for the same reason.
Misting is fine but I dont ever rely on it soley. Your cham dosent know its supposed to drink when you mist

When Homer was a hatchling I misted alot for fear of dehydration, he must've thought
he was a fish. These days I only mist when hes shedding pretty much, sometimes just to
clean the plant leaves that dont get wet from the dripper.
Once you learn your particular lizards habits (drinking) you will find continuous dripping during the day provides the best opportunity for it to drink when it wants to.
Misting can/does stimulate drinking, but your lizard has not lost its self preservation instincts because its captive, it will drink when its thirsty, provided its able to, hence continuous opportunity is best imo.
Gutloading your lizards insects/worms with nutritious and moist fruit/veg will ensure better moisture content in its food and goes a long way toward releiving concerns of dehydration also.
best wishes