Hi Matthew,
A few years back I received a copy of the December, 1998 magazine, "Guideposts". In it, there is a good article on Laura and her father, written by her grandson Eric Buzzell in Croghan, New York - (If some of this has been covered already, I apologize.) Buzzell writes about how he was contacted by a magazine writer just after the movie came out and the magazine writer had a copy of an article written by Laura entitled "My Experience of the Wreck of the R. M. S. Titanic". Obviously, because of copyrights, I can't quote it here but if you contact the "Guidepost" magazine company at 39 Seminary Hill Road, Carmel, N. Y., 10512, I'm sure they can get you a copy or, at least, the text.
I'm sure Phil G. knows much more about all this than I do but I thought this might be of some help.
Best regards,
Cook