I visited Epcot in March, Chuck. As it appears you already know, Epcot is surprisingly rich in fragrance offerings. What I like about Epcot is that it offers a slightly different selection than you might find in your average American mall.
Without a doubt, your first stop should be Guerlain - try the Beau Cavalier EdP version of Habit Rouge, not easily found elsewhere but they regularly stock it at Epcot. They have all of the classic feminine extraits - Mitsouko, Shalimar, etc., but they also carry Sous Le Vent and Vol de Nuit (in EdT only, I think). I routinely give the Dior and Chanel SAs my 2c worth for not carrying their houses' more intersting scents (no Chanel Exclusifs, alas!). Annick Goutal always tempts me, but I haven't succumbed yet.
The Italy pavilion is awash in fragrances. They have the entire Bvlgari line, and I believe most or all of the Acqua di Parma line. Almost pulled the trigger on Profumo this time, but it was just a little too feminine and I didn't believe I could justify its cost just to sit on my shelf unused.
I feel your pain regarding Neir Gess. The Norway gift shop reeks of it, and each time I visit I promise myself that I'll buy a bottle. But I've resisted that purchase too because it's a bit too sweet for my taste.
The British shop stocks Miller Harris, but no Penhaligon or Czech & Speak. Bummer.
Have a great time, Chuck. It may be a bit warm and humid this time of year, but it should satisfy your fragrance hunting needs for a while.