I tried to do all 4 parks in 1 day, but my body didn't cooperate (have some medical issues) and a stupid lunch ADR got in the way too. I did Thunder Mountain & POTC, Test Track, & RnR. I almost made it to EE but I couldn't walk that far, I sputtered out.
So I am gonna try it again in the next few days with better planning this time, and no ADR's either.