I'm planning a CDT thruhike in 2010 and I'm in a quandary about whether I need something on my lower legs. I found my Sportkilt hiking kilt very comfortable for the entire PCT including the section I started April 5 southbound from Walker Pass. I also have worn the Sportkilt on winter hikes and snowshoe trips (with high gaiters) in temps into the teens and have been comfortable while hiking. When I get to camp, if it's truly frigid I can put on my Smartwool lightweight longjohns if I'm up and about, or jump in the bag if I'm chilled. The only possible negative about the kilt is it might have a negative effect on getting a hitch.
I did learn the hard way NOT to glissade on my butt in the kilt and had some serious road rash to contend with after an unscheduled glissade down a snow chute off of Mt. Baden-Powell in mid-April.
I carried the zip-legs to my shorts when I started the AT in mid-March, then sent them home at the first opportunity. Since I never wore the pants bottoms, even in the snow, they were just dead weight. Got the kilt near Partnership and wore it the rest of the way.
I'll also be wearing Dirty Girl gaiters during the hike except when I'm in snow in CO or MT when I'll have ID eVent low gaiters.
Do I really need long pants and/or high gaiters with shorts or a kilt? Your thoughts anyone?