No, dont do it. If you want to go to US do it, but dont try to drag your 8 month old on the rides. He wont remember it, he will probably get cranky and scared, and he will make you mad because you wont be able to have fun because you wont be able to ride the rides the way you want.
Then you'll be back like all the others saying how little there is to do for kids.
I say if you take your 8 month old, use the child swap feature. Dont try to take him on a lot of the rides as most of them (JAWS, Earthquake, ET) have loud noises that will scare him. Spend time in the playgrounds with him, and do all of the shows like Barney and Sinbad.
He wont enjoy it, he wont remember it, and you'll thank me later.