Your engagement photos made me tear up. How beautiful!!!!
I saw suggestions for pink, purple and grey or brown for your colours and think that sounds lovely and is a compromise version of the more overtly Mickey colours you originally wanted. There's also nothing that says you have to do the same colour scheme for both ceremony and reception. It's what is usually done, but you could borrow a page for very cultures who change outfits and themes throughout the wedding festivities, and have a pastel, pretty ceremony and then go buts with more Disney theming in the reception. If you can't be over the top and fabulous with costume changes on your wedding day, when can you be???
I really look forward to seeing more!