The bus stop at MK for all resorts is located just to the right (if you're looking at the MK from, say, the 7 seas lagoon)...of the entrance to MK. It's a little walk past the boat launches to get to the entry gates. Not bad at all!
There's a loop roughly in the shape of an upside down "U" with bus stops on either side, depending on the hotel. It's just a few steps to the front gates.