I usually subscribe to the "tis better to have it and not need it..." school of thought. However, I have limits.

At some point being totally prepared means toting a ton of weight. Learning to do without is good, but I am not forgoing TP for leaves. But I also don't want a pack that is so heavy it detracts from the fun I am supposed to be having.

I guess it depends on where you are in relation to civilization. The farther out you go, the more you take.