My husband and I are in our early 40's and have done a fair amount of moderate to challenging hikes in Yellowstone, the Smokies, and Glacier. This will be our first trip to RMNP. After our last trip to Glacier my knees hurt for about 3 weeks so we're thinking about buying poles. Do we have to use 2 each or will one help at all? I usually find a nice sturdy stick and use that for my hikes so I'm leaning towards just 1-thinking if I use two I wil feel like I'm skiing.....or does just using 1 defeat the purpose of them? Hope this isn't a really stupid question-thanks!