So if Disney is going to deploy internally a monitoring system, they have to have a robust plan on what the testing is, the criteria, and finally a contact tracing plan internally. They can certainly do this and have the funding and modeling to do it. They already know schedules and simple matter of scraping
MDE data or whatever CMs carry that their phones/communications devices. It would be quite interesting to deploy and yet another role model type of 'pilot case' where Disney can showcase and get preferential treatment on reopening --- if it wanted such.
Edit.. this strategy may actually get DLR not only open but stay open by showing a good protective environment for both CM and it's patrons. It is a bit much to do even for a Dow30 company