You really need to read the book. It has all the info you need to do the MC. Browse the forum, lots of stories of how folks cope. Read the FAQs. People routinely do the Master-Cleanse for 14,21 and 40 days. 10 days is the minimum. Read the Detox Stages in the FAQs to give you an idea what to expect and how long to do it to meet your goals.
Many including myself premix our lemonade for the day. I split mine into 3 qt sized Nalgene bottles with sports spouts and put them in a cooler with some of that reusable blue ice