Not really following your question. It sits in between Caribbean Beach Resort and Epcot Center Drive and I-4. As far as the closest park, EPCOT is really across the street from the entrance, but the entrance to MGM is probably the closest major theme park entrance with Typhoon Lagoon also being pretty close.
You can't walk from the CBR to Bonnet Creek. If you want to save a few dollars I guess you could take a Disney bus to CBR then take a cab to Bonnet Creek.
It is pretty close to Pop too. and yes it is closest to Pop and CBR. Epcot looks close - but look at a map -there is the forest and rescue area between it and Epcot.
but again nothing on WDW property is within walking distance of Bonnett creek.