I went to the Leki site, but unfortunately, the two pages where they explain the anatomy of trekking and NW poles, I get a question mark instead of the info

Why does this happen when you really want to know something? I am thinking, though, that trekking poles will be what I need, given the kind of walking I'll be doing. And also, I do want to get back to the mountains next summer for the first time in years.
dede62, I am a member of REI and also have their Visa card, so I try to purchase from them whenever possible, even though it has to be online. I doubt there are any knowledgeable salespeople down here regarding hiking/NW---I should check the hikers' meetup group. Hadn't thought of that before. Will do that.
Some of the trekking poles have shock absorbers. That seems like it would be a good idea---any opinions?
nerdgrrl I expect to be on the knee side of this forum, too, hopefully not real soon. If someone had told me a year ago I'd be having a joint replaced, I'd have said "oh, yeah, one of my knees." When the hip made me stop walking, the knees got better. So now that I'm able to do a little hiking, I want to do everything possible to save my knees, and I've been using the trekking pole more for that than for my hip. That's a great idea about hooking the camera case to the pack strap. So far, I've just been using a little day pack without a chest strap for my 2-3 hour walks, but I have larger packs that method would work with.
darn! It is good to know you've got my back
Poppet I'm afraid I'll never be able to get out there and do NW for exercise because of my knees, and also because I tend to stop and stare at things and take pictures. So given the dawdling sort of hiking I do, do you think there would be any advantage to getting NW poles instead of trekking? Both seem to come in light weight versions, and some of the trekkers have shock absorbers.