We also have used Garden Grocer and were more than pleased with their service. The fresh fruit was some of the best. We will be using them again next time.
I would also like to let you know that Fort Wilderness has a grocery order list that is available, there should be a list and info in your cabin. I found that what they have is what is available at the Trading Post at the Fort for the same prices but has a $10 delivery charge.
The selection at Garden Grocer is much better and you can get fresh produce (grapes,melon,ect.), and meat for your grill at better prices.