Welcome!! I'm planning our wedding right now for October 12 2014, for we're hoping around 70 people

The first major thing that comes to mind is that if you are interested in an Illuminations dessert party, you cannot have them on Fridays and Saturdays during F&W (Disney says the general crowds in Epcot are too great to close off pavilions for private groups). Also Italy West pavilion is blocked from dessert parties for the whole festival (as this is where the Eat to the Beat concert queues up). If you plan on blocking any of the Epcot resorts for your room block, these resorts have a habit of selling out (though your rooms you've blocked will be held till 30 days before). We decided to block extra rooms at Beach Club just so we would have wiggle room, since we knew that there was a strong chance it would be difficult to add more rooms to our Beach Club block later in the process if our guests filled it up (our date is also over a holiday weekend, so we're being extra cautious regarding that). I can't think of any other specific F&W obstacles we've encountered in the planning - mostly we're just thrilled to pieces that our guests will get to experience the festival (as well as
MNSSHP!) Finally, if you haven't yet, do yourself a favor and download the Passporter's Disney Weddings & Honeymoons (written by a former Disney bride, lurkyloo on these boards). It'll save you lots of headaches on the Disney-related side of wedding planning!