prb46,
There is always the amazing story of Capt Ed Daly piloting a 727-100 with over 300 people on board! Evacuees stuffed in the cabin, cargo holds, landing gear wells. There are many accounts written (I think there was even a book), and well documented. Hopefully, this will give you some more information for your book. Don't forget to send me an autographed copy!!
http://www.worldair.com/investors/history2.html
The “Last Flight From Da Nang” garnered worldwide media attention as Daly and the World crew fought off thousands of would-be passengers seeking refuge on the aircraft, dodged bullets and grenades, and ultimately carried more than 300 people to safety in Saigon.