There is not much you can do at this point.
The Recently Deleted folder is there to recover accidentally removed photos. If deleted from there you're out of your luck.
Do you have any backups made (in iTunes or in iCloud)? You could restore the backup (if you don't mind losing your data from today) or use a third party tool to read the backup.
Do you use Photo Stream? there may be copies there.
Did you text the photos to someone? You could save the copy from your Messages app back into the camera roll.