I don't own a truly big backpack. The biggest I've got is probably not much bigger than 50 liters. I took it into the Bugaboos last year for 7 or 8 days and with some creative lashing it worked perfectly. It was big enough, but I couldn't have fit another item or day's worth of food in or on the thing. Which makes me think I might need a bigger backpack at some point in the future.
It was nice having that pack since, once emptied and cinched down it functioned great as my day pack for climbing. But I'm sure there will be a time when I need something bigger.
I've got an old external frame behemoth at my parent's house that has been collecting dust for 10 years. It seems big enough to handle anything.....but something tells me that I should invest in a better-quality, newer, internal-frame pack instead. Saving the money would be nice, and it wasn't a bad backpack to begin with (and really isn't that old, and barely used).
So.....for hauling decent-sized loads into the wilderness, would you consider using an old external frame pack, or would you spring for a new one? Taking into account my financial status which is best described as "broke."