Cane
 

I will probably need a cane to get me through the airport on an upcoming flight. I have both a folding cane and a stationary one. If I bring the folding cane, can I fold it up and keep it with me? If I bring the stationary one, will the FA stow it for me? I really won't need it on the plane, just for the long walk through the airport.

FAs will stow in a closet and give you priority consideration for placement as required by rules.
We always have a window seat and they allow us to lay it along the sidewall under the window so it's available upon arrival.

Folding canes are fine. My wife has traveled with one, and on occasion with two, many times - in US and elsewhere. Rigid canes might be best stowed overhead or by the FA. IMO overhead makes it easier for lav travels, etc. but put it in after there's have placed their bags.