Well, I went camping this summer and my batteries all died. Up until this point, I have been terrified to smoke a cigarette for fear that I would start smoking full-time and give up on my e-cig. But I smoked for two days camping and when I could get my batteries charged I just started back in with my e-cig where I left off, no problem, no craving, cigarettes just aren't a big deal anymore.
Just make sure you have a few good batterys (preferable 650mah or greater) and keep rotating their charge, bring two with you when you go out (or 4 -or a pcc if less than 650 mah) and IF YOU HAPPEN TO slip and smoke, just remember it's not the end of the world - you'll just start where you left off when you get back home again.
Good Luck!