This is where the bus to the Florence airport leaves from:
http://maps.google.com/maps?q=stazio...leria&t=m&z=16
as you can see, it's really close to the Stazione Santa Maria Novella
as for trains, it's possible that not all trains are still updated since July is far... just wait another month or two and there will be lots of trains
Just like there are now... example:
http://orario.trenitalia.com/b2c/npp...ag_r=1&x=0&y=0
So, you're doing grado, ferrara and firenze! Great!
I'm doing Grado and Ferrara... and you should hurry up for tickets of both gigs because in Grado they are numbered so the sooner you get them the better the tickets, and Ferrara holds less than 600 people so tix will fly away soon...