Little late for this response, but we had one near our front door, a huge spider, which we left alone. She had over time three large egg cases, one about size of end of man's thumb, next a little smaller, and last one a little smaller still.
We checked on her fairly often, and soon after found her lying dead under her web.
Walked into many a web in early morning dark going hunting. Didn't really like it much, but I think those big spiders are nice to have around.
And read somewhere that black bears loved to eat them!