I worked from home during the first 2 days. It was fun to watch. If you can, try to work from home.
I was there for the dig, plumbing and decking on my first pool build. Work travel caused me to miss the other fun things (gunite, pebble). This time around, I am working with the job scheduler to maximize the time I can be there to "supervise". If nothing else, this Under Construction forum has made me aware of many things that can secretly go wrong that I need to be on the lookout for.