The easiest way it to take a bus to any resort (the all stars and CSR are close to BB, CBR and several others are close to DTD) and then from there take a bus to DTD.
Or maybe there's a resort you'd like to see more of? Transfer there and use it as an opportunity to check out a place you aren't staying at.
I tried this once because I was waiting for one resort bus, but a Saratoga Springs bus arrived first and I knew SSR was close to DTD.
But, I learned I needed to be a student of the SSR site map, because at the first bus stop I had no real idea how to walk the property to find the path to DTD. I wished I knew which of the SSR bus stops was best.
Ended up waiting (with a bunch of other people doing the same thing) for the DTD bus from SSR. Sigh.