I'm really fond of those Y-crooks that come with hiking staffs: they're meant to steady a rifle, but can actually cradle most lenses just as well. I like these because they are quick, light, and also mean you don't have to set aside your walking stick to shoot. It's not quite as steady as a monopod of course, (especially if the stick itself is erring on the side of lightness rather than rigidity: my such pole bent and later broke after saving me from getting hurt in a spill on some ice, (The parts are now combined with a cheap aluminum tripod from a thrift store, voila: Light stand.
) ) ...but it's just a matter of a few bucks.
With my arthritis and such, I found the Y-shaped rest to be a lot better than fumbling about with things in the cold: no need for a ballhead or anything to do verticals, etc. for something more rigid I'd been just waiting for a mismatched/orphaned ski pole to turn up. I was somewhat prioritizing just having something to help me walk and take the weight of camera and heavy sleeves,but for better steadiness it's just a matter of the right pole. (One of those trek-pod monopods looks like it'd work well in that combination.