The bus will drop you off close to the park entrance. You are not allowed to walk to Epcot, or any other park, from CBR. There are no sidewalks. You would be walking along a busy highway...something Disney does not want to happen.
If you want to walk to Epcot, you have to stay at the YC/BC, S/D or BW...other than those resorts, you have to take a bus.