Hey there JayBee. Although i have just started growing and have yet to experience a harvest, i have done alot of research on harvesting and the whole drying process. Many people, including a friend of mine always stops watering the plant for 24 hours sometimes even upto 48! If during the growing cycle, water and nutrients were consistent, there should be enough water in the soil and leaves to feed your buds for another 24 hours. Sometimes the larger leaves start to dry out but remember they are being cut off the next day.
Personally when my plant is ready to harvest, i will be doing this to give a cheeky 'headstart'!
I hope this helps :)