You could walk from the Downtown Disney Market Place bus parking by walking along the street (E. Buena Vista Drive) towards Saratoga Springs. You will run out of side walk, but you can walk on the grass and then cross over the street at the Fire Station. A safer, but slightly longer route would be to walk across the street (at the crosswalk by the toy store) over to the Wyndham Palace. Walk via the parking lot along E. Buena Vista Drive to the Fire Station. From the bus load zone it should take you less that 8 minutes walking. Click or copy this link for a map. The big red star is the fire station.
http://maps.yahoo.com/maps_result?e...VUN.qCw--&csz=Lake+Buena+Vista,+FL&country=us
http://maps.yahoo.com/maps_result?e...VUN.qCw--&csz=Lake+Buena+Vista,+FL&country=us