Ahhh...the $1,000,000 question! I thought I would be helpful and check the Shades of Green website for you, but alas - it doesn't help! The closest I could find was the following Q&A:
Q: Can I dine in your restaurants even if I do not hold a reservation at Shades of Green?
A: Yes. You will be asked to provide a valid military I.D. to access Shades of Green property.
So my guess is if you are military (or anyone in your party is) you can definitely dine there...but without military ID you won't get into the resort.