Yes, there is a paved walking path from OKW to DTD Westside. I was planning to walk it, but never got "round tuit". However wrote down the directions:
Behind building 55 at OKW (South Point bus stop) immediately cross canal spillway. Follow along far side of canal towards Disney Institute and DTD. Cross bridge. Follow walking path to the left, not golf cart path to the right. Canal is on your left and you can see OKW to left on the other side. Canal joins main water canal that boats from OKW use. Path improves and has lights. Another bridge will enter from your left from Institute. Veer right, go past any golfers waiting to tee off. Enter by HOB.
These are the directions as I was told. Remember, since I didn't use them, I don't know how good they are.