I love the sound of champagne and coffee roses too - let us know if you decide on this combination. I believe the hidden Mickeys are available in pearl and crystal, for the bouquest and buttonieres, at around $3 each.
After my planning session on Tuesday I will definitely tell you all what I chose. I love the idea of the hidden Mickey in the boutonnieres! So cute! They think of everything!
As for the preservation, I had a friend who had hers done by Disney (I am not sure if it was an affiliated co.) and she said it was costly . . . but it should would make things easier!