Please feel free to upload your images as soon as you have added the cemetery. Why?
The main reason is after 100 images are uploaded in the cemetery you added, its AUTOMATICALLY approved. No need to wait.
If you are concerned that your images are being uploaded to the wrong cemetery that is really not a problem. Here's why..
The images have GPS coordinates on them. The Cemetery markers have their own separate information as well. So when the cemetery is added the images can be recalculated to the cemetery. Most of the time this is automatic as BillionGraves has a program that recalculates every day.
In short.. No reason to hesitate when uploading your images! Even if they go the wrong cemetery that can be EASILY corrected.