You'll find a few good resources at the following link:
Closer to game day there will even be a gameday program on there.
This year, it looks like they are allowing you to bring in an empty water bottle to be refilled in the stadium. I'd have the daughter have a bag (the required clear bag) and put the water bottles in there.
-----
Here's a basic run down of what my daughter and I normally do when we come in from out of town.
Based on an early afternoon game.
- Drive in and park at SOC (https://olemissgameday.com/football#parking-shuttles).
- Take shuttle in and walk to the grove in time for the walk of champions.
- Experience Grove then Walk of Champions.
- Watch the band play (usually 30-45 minutes after walk of champions).
- Go in the Student Union and have lunch. (walk through the bookstore and look at gear as well)
- Walk over to the stadium. (there will be photo ops posted closer to gametime at https://olemissgameday.com/football#gameday-selfie-spots)
- Grab the shuttle back when done with the Grove and/or game.