I discovered a great way to get legs accustomed to carrying a lot of weight (backpacks) all year round.
It's called the Walk Vest and has pockets balanced all around to carry up to 16 lbs. I found that the weight is distributed so evenly that you need at least 12 lbs. to feel anything. I'm using the vest instead of a weight packed backpack to train with. The vest is made of mesh so it breathes. Sizes run a bit large. Cost is $79.95 for the vest which comes with 4 pounds of weights. Each additional 4 pounds is $14.95, shipping is $14.95. Great investment though for year round conditioning. It has a waist belt so you can jog with it.
Got mine through Techno-Scout or
www.walkvest.comI'll probably do a little short run up from the Portal with the vest the day before my actual hike.