After years of experimentation, I have arrived at a procedure which works for me. First, I squeegee the prints front and back with a regular auto windshield wiper assembly. Then I air dry prints in an atmosphere of about 60% RH. (I live in the Maryland swamps :-). ) When about 85% dry, as observed by a slight curl - about 6-8 hours, I place the prints in a blotter book (kept very clean) and weighted by several large "coffee table" books, making sure there is an Ansel Adams and a Weston among them - this is important!
This takes a bit of time as the prints require about another 24 hours in the blotter books, but the results work and once done they keep their shape throughout the remaining presentation procedures regardless of the intervening time.
Truly, dr bob.