[quote="dukeswalker"]If you do take this on, I would forgo fondant and go for a rustic buttercream look or go with a cupcake tower and one 6 inch fondant covered cake at the top of the tower. I would also suggest starting NOW. Bake/wrap/freeze anything you can now. I would also suggest inviting over friends for a "cupcake decorating party".
Good suggestions dukeswalker. I was about to suggest the same thing...going for a 'rustic' aplication of just buttercream would eliminate a lot of stress and work. And tools too!...if you go with fondant then you're going to need to get some fondant smoothers, a wide bench scraper, pallet knives, turntable etc to get a good finish - whereas a rustic buttercream finish you can apply with just a pallete knife or the back of a spoon.
Definitely bake the cakes, wrap well and freeze so they're done in advance, don't try to do everything at the last minute...what you're taking on is a big enough job as it is.
I'm not a pro caker, but I make loads of cakes for family and friends...I would turn down any requests for a cake for 400 - that's a big undertaking!
Good luck with it though! And remember to post a photo of the cake here when you get back from the honeymoon!
ETA: here are a few pics of some rustic buttercream cakes, in case you're interested:
2 tier pale green with white daisy borders: http://cakecentral.com/gallery/1743208
3 Tier white with green flowers: http://cakecentral.com/gallery/1465608
3 Tier with silk hydrangeas (I love
this one, it's really pretty!): http://cakecentral.com/gallery/1742518
3 tier with gerberas: http://cakecentral.com/gallery/1939242
2 tier with yellow ribbon and roses: http://cakecentral.com/gallery/1561301
3 tier with red roses: http://cakecentral.com/gallery/1841597
3 tier with mixed flowers: http://cakecentral.com/gallery/1476718