As far as dimension for building your own gearskin... When I built my gear skin I made it 12" wide, 6" deep and 60" long. To see photos check out my gallery.
Sgt Rock has a GREAT review of the Moonbow GearSkin.
I am very, VERY pleased with my gearskin. It has held up well, supports heavy-ish loads (30 lbs) and it feels very comfortable when packed up and cinched down.
As for rain... I put everything into sil-nylon stuff sacks and then I also carry a pack cover (that I use for lots of things like gear hammock, quick storage while camping, etc)
I love my gear skin. I can see places where I can improve my design, but for the most part I love, love, love it.
"Life is to be enjoyed, not just endured"
In my case Cedar Tree made it special because of the bear canister I carry on the back of the pack.
I also use the Packa as part of my insulation in the hammock - it helps keep my right shoulder warm.
HOI, that is cool that he made the packa special for you because of the bear canister. I do like how you rigged it up to be carried. Saves a lot of space in the pack
Checked your bio ... to be 20 again.by Brian
Oh, the good old days when we were young
Some of us are about 3X of that
But I started backpacking late at 48.
However, what I carry now is about half of what it was then Internet education on hiking is a great learning experience. Better than what's on TV.