Frankly, including ALL this information would probably be MORE overwhelming to her. I don't have access to the spreadsheet for my family, but all I listed was things that were at specific times, like ADRs, parades we need to hit, and FP+s. Even these things are liable to change, but any further plans are going to be a mess, especially with that large of a party. If you're planning out every minute, realize that not every person may want to follow the plan: you'll probably split up and come back together a few times, as well as change your plans completely for the full group. If they're overwhelmed now, you might be giving them too much information. Just give them a more basic spreadsheet or list each day of "this thing happens at this time. I'll be there. You can be there or not, up to you."
As for including potential snack credit items and menus: that's just too much. You're way overwhelming them with information. They can peruse the menus and decide what they want when they're actually at a restaurant. Most restaurants include things for pickier eaters if that's your concern, and an adult can always order a larger portion from the kids menu.
Let them know what a snack credit symbol looks like and they can decide their snacks as they go about their day. Let them know, value wise, they're going to want to use it on things over $4. And, if you're worried about keeping track of individual people's allotments on a shared plan, maybe print out punch cards or sheets they can cross off. Once you're there (and checked in to your hotel), show them how to view remaining dining credits on the
MDE app.
Frankly, if they're even somewhat tech-users, most of this can be handled by signing them up as friends included in your plans on MDE (so they see FP+s and ADRs), and being sure they know what time major shows you're interested in are (fireworks, parades, etc). It can still be nice to have a basic every-reservation-at-a-glance spreadsheet, but if they're overwhelmed it might be easier to just see a bit at a time.
