As some of you might know, one of my hobbies is lifting stones. Besides regular weightlifting I do strongman things too. I need a book bag (or something I can put on my back like a hikers/adventurers/Indiana Jones bag) that can hold about 200lbs of "stuff", more would be even better. Right now I have a military canvass bag that can hold about 150lbs, but it requires a "bear hug" grip and is filled to max capacity as of now. So, any ideas?