Hi there, Greg! Welcome to planDisney!
I'm so excited that your family has a trip planned to 
Walt Disney World Resort! I'd also like to sincerely thank you for your service. But oh, bother – I'm sorry to hear that you're feeling under the weather and may not be able to attend! I'd love to help you navigate the options that are available to you.
Greg, Eligible Service Members are active or retired members of the US Military and their spouses. With that being said, I'm happy to let you know that your wife will have no problem accessing the park with her valid and active spouse Military ID! As a military spouse myself, I've often entered the parks without my husband (the service member) as long as I had my Military ID. Before you arrive, you'll just want to make sure that you've 
linked your 
Disney Military Salute Tickets to your 
My Disney Experience account and make your 
theme park reservations with the Disney Park Pass system. This is an important step to reserve the parks you'd like to visit on each day of your trip!
However, if you prefer to try to move your dates to another time you're available when you're feeling better, I'd recommend that you 
call a Cast Member. They will be able to help you with any next steps that may be available to you. Please remember that your Disney Military Salute Tickets that were purchased this year expire and will not be available to be used after December 15, 2023.
If you have any other questions, please reach out to us again! After all, you've got a friend in me.
See ya real soon!
Michelle