Should I use a stripper or sander to remove paint on my deck?
The wood looks to be in good shape; this is fortunate. I think your best bet is to use a large drum sander from a rental place; just make sure all the nails/screws are sunk below the level of the boards. If you use small power tools, it will take a lot of time, effort, and sandpaper. If you plan to re-use the spindles and they are painted, a grinder worked better for me than any orbital or belt sander.