We are in the same predicament as the OP, we are arriving 5 days before our cruise. We have little kids and really do not want to bring car seats and rent a car. If Inspire can not process results in 72 hours of the mail-in tests being taken, then Disney needs to change the length of time back to 5 days. I'm guessing the original time frame was suggested by Inspire as a workable process. So Disney is going to turn away families who say they mailed in their tests supplied by
DCL's partner 3 days ago because the results aren't reported yet?