OK, AnotherAlice, here is how you get to the aforementioned 7-11 and Walgreens.
This is the route to the Winn Dixie grocery store from the Fort.
The route begins on the left of this map at the exit from the Fort's overflow parking lot.
From there, you turn left on Vista Blvd.
Take Vista Blvd. until it dead ends into Winter Garden-Vineland Rd.
Turn right.
Take Winter Garden-Vineland Rd. until you get to Apoka-Vineland Rd.
The 7-11 is right at this intersection.
If you turn left here, that will take you to the Walgreen's, and the Winn Dixie is just a bit further.
Piece of cake:
To help you visualize further, here are some screen caps from the Orange County Property Appraiser's website.
You can see the 7-11 and other businesses (including a lot of restaurants) here:
Note where the Chili's is in the image above. Here another shot showing what is North of the Chili's:
The Winn Dixie is to the right of the ABC Liquor Store that you see toward the top right of the image above.
As you can see from the Google Earth Map, all of this is less than 5 miles from the Fort.
Going out of the WDW property this way avoids a lot of traffic.
But, it also dumps you out into the real world and shatters the image that you are far away from it all at the Fort.
TCD