The paved path from/to WL-FW is still open. The wooded path that runs along Bay Lake is closed due to construction. When staying at WL, I usually run the path down through FW daily and it's never crowded. You can also bike along it and I've seen the occasional skateboarder and rollerblader. No golf carts are allowed.
One thing to keep in mind, the path is not illuminated so you can't see your hand in front of you in the dark. I discovered this years ago trying to run before sunrise. I had to turn around and go to the gym instead. The path is not very long and walking it takes about 15 minutes. After it ends, you can continue on some wood chips near the stable and ponies, go by the Pioneer Hall bus stop, cross the street and head back along the sidewalk that will take you around FW and eventually, back to the trail. This route is much longer than just the concrete path.
From FW, the path starts where the stable with the draft horses is located, right near Pioneer Hall, the Pavilion, and marina area. It's marked "EXERCISE TRAIL" on this map from POST 4:
There's usually wildlife along the path and it's very wooded and pleasant. I have photos of the trail, stables and horses being shod
HERE in the WL thread.