Fall Wedding Colors And Flowers

Hi, I`m getting married Nov 13th 2004 in Pa, it`s beautiful that time of the year, I was thinking of going with a burgundy color for the bridesmaid attire and a fall colored boquet (oranges, red/burgundy, golds, etc) for the cake I wanted to just have a plain ivory colored cake with some hints of the various fall colors, does that sound like a good idea? Another alternative because my hubby to be loves blue was to go with a navy blue, but I want to intergrate fall colors in our decoration for the reception. Does anyone else have any suggestions? Oh another question, what flowers do you use for a fall wedding, I`m a huge Orchid fan but, I don`t think they are fall flowers....would it be ok to use silk flowers for the boquet and centerpieces?

Thanks in advance. :-)