I tried carrying 100' and 50' lengths of paracord, but hated having to unravel it each time I wanted to use it. My father used to carry 15' lengths of cord with him when camping, so I started doing that. Its a VERY handy length for all sorts of camp needs, plus I can alway tie two lengths together when needed.

Now I buy two 100' hanks of the wonderful orange paracord from countycom.com. I cut each of two of those hanks into 6 equal lengths, which works out to about 16+' per length.

That produces twelve 16+' lengths that are each wrapped around my palm and cinched down into nice easy to manage bundles. I usually carry eight of them in my daypack, which is 133' total.

I also try to carry 50'-100' of heavier (3/8") braided nylon rope in my larger camping gear bag - wether a duffel or backpack. The larger rope does better for clothes lines and such.