I recently got a bouquet in the mail, and when taken apart, this is what remained. Needless to say, the flowers did not arrive in superb condition since they had not been in contact with water since the morning of the bride's wedding 4 days earlier.
When you discuss your flowers with the florist for your wedding, please let them know that you will be preserving them. Ask how it will be wrapped, and try to get them to use the entire stems of flowers so you can easily keep them in water all day and until it needs to be shipped out. Had this bouquet contained water-loving flowers like hydrangea, there would have been no salvaging it at all.