Yes, everything will probably change slightly, but it's a fact of October visits that EP will always be busy. That is especially true on weekends. Strange that they would ever have EP as a 1.1 on an October weekend. According to easywdw, EP is only recommended on 10/21 and 10/24. Do your adjustments now and hope for the best! Cape May is maybe a 10min walk from the International Gateway in EP (in World Showcase). Since your family loves seafood, I say go for it. We love Biergarten. Also love Via Napoli.