It's about a mile, there is a walking/bike trail (not lit at night, very spooky)! You can take the boat to WL from FW too, then boat from WL to MK.
You can also boat directly to MK from FW, you don't have to go to WL unless you want to, there are separate boats for each of these. You can also go FW to Contemporary.
Isn't Disney transportation fun!