Last year when I tried them, I just had them go up to mid-calf. I figure if you want the VB for your feet, why not have it go high up as well? I found some slightly smaller ones at the store the other day, though, so I'll try these for our trip.
Speaking of stoves, I have my old whisperlite, but haven't tested it yet to see if it still works. I'll do that soon, and I'll have to get some white gas before testing. Anyone else need white gas? I'll just bring the whole jug in my car.