You can cross the bridges over to the Disney Springs area - the sidewalk that goes past the old bus stop and the security checkpoint is not restricted or closed - so if Disney Springs is still closed in the early morning, you can still walk over the bridge to Saratoga Springs and walk the grounds there. Saratoga is a very big resort and lots of walking paths, lakes, fountains, etc, so if you're just looking to walk around a pretty area, see lots of birds (there are always egrets, herons, limpkins, osprey, kingfishers, and even wild turkeys wandering around Saratoga), it's a very nice spot for a morning stroll. Artist's Palette opens at 7am so you can also grab coffee or breakfast there early if you wanted