Define "long". Go for a walk, no problem. Got more than a hour of walking planned and I'd be wanting to bring along a small backpack with some water, maybe something sweet, and a flashlight if it is late, and some shoes that won't do my feet any harm. Let's just say that I have tested the limits of sensible walks a few times too many.
Would you like me if I had the same relation to cell phones as I have to The Black Plague?