I've seen some intense spreadsheets out there! I created a very basic one where the first tab is a high level overview (morning/noon/evening) of my week where I indicate which parks I plan to visit, which ADRs I have made, and where I might be able to space out snack and CS credits. I find that's helpful when making the major plans - that way I'm not scrambling to use credits at the end of my trip and also so I can visualize when we might be eating so I don't plan meals too close together. (attached is a pic of the HIGH level schedule that I use when planning - very simple and basic
The next tab is an hourly listing of each day where I can break down travel times, nap times, etc. Admittedly, I don't use this tab as much as the first.
I also have a section in the workbook that lists all of the costs (room/DVC rental, flights, park tix, dining plan, stroller rental, grocery/amazon order) - with paid amount, due amount, and due date columns.