The Tunison Foundation will be attending with 3 C-47s that lineage back to WW2. If the VAC C-47 attends, that will make 4.
From Sun N Fun:
The Tunison Foundation, a non-profit organization that owns and operates World War II-era aircraft, is proud to debut their newly minted D-Day Squadron at #SNF18. The group will feature three D-Day Squadron C-47 aircraft that are preparing to cross the Atlantic to return to Normandy next summer for the 75th anniversary of D-Day!
Flying in are Placid Lassie, Liberty Foundation and Virginia Ann, C-47 aircraft that are all veterans of the D-Day invasion that sparked the beginning of the end of World War II.