For those of my clients involved with their first time renovation, they usually underestimate how much availability they need in order to keep the project moving. Unless you have given your designer and contractor full reign to make every decision, you are likely going to get some e-mails and phone calls. If you do not have a full-service designer helping you, then you will need more availability. I can tell you from experience with addressing correspondence for my full-service clients, they calls and e-mails come in waves.
I have found that the more clients know about design terminology, often the easier it is to communicate and the more successful the project. By no means do I expect all homeowners to formally study design before diving into a renovation; if they did there would be no point in hiring a designer. My point is, from both sides, things should be communicated as clearly as possible.
I am not going to sugar coat it, renovations can get messy. Ideally, if you can avoid living in the home during a renovation, I say do it. However, the average homeowner cannot afford it. In order to maintain sanity during the process (especially if you are living in the dwelling throughout the process), one of the most important things to ask about during the contractor selection process is how they address cleanliness and safety on a job site.