Hi Mark! Looks like you are almost ready to go a REALLY long way...the video is really good, and I had no idea how far you were going. I am learning a lot about the arctic tussock tundra up here, but the other day we did visit a bit of alpine tundra at a higher elevation. I've had several occasions to pull on the xtra tuffs from CPS, they fit and they work! Looking forward to your trip!