This is an overview from the American Institute for the Conservation of Historic and Artistic Works. I would recommend storage in a room of your daughter's house, if it is air-conditioned, wrapped in archival, acid-free paper. NO PLASTIC!
If the photos are stored in an attic or basement, they will be subject to damage from humidity and/or insects. (Or even MICE! My mother unbeknownst to me many years ago stored a box of photos in a closet and mice got into them. Lots of things were damaged and couldn't be repaired.)