The beach faces over Bay lake looking towards Ft Wilderness. The beach is more in front of the VWL than the WL. For directional purposes, if you are standing on the beach looking out over the lake, then on a clock you are looking at 12 oclock. The Contemporary Resort would be at 9'oclock and MK would be around 8 oclock.
I would not expect that you would be able to see any of the fireworks because the WL would block some of your view and their are tall trees just beyond the WL that would block the rest of you view.
To see the fireworks from the WL you need to get up high to avoid the trees.