Just a comment on the shoe idea...
I wouldn't wear sandals or flip flops to Disney World, even though I love to wear them all the time. I wore them last year chaperoning a trip (what a harsh job I have at times

) and my feet got stepped on, run over, stuff spilt on them, etc. It seems that especially when there are small children running around everywhere, they seem to forget about how everyone has toes that don't like to be stepped on.
Just my opinion...
Oh, and if you go to Epcot, eat at the sit down restaurant in Italy!