Be realistic about what you need to take on your vacation, buy restricted items you need once you arrive, and enjoy your trip
Without nicotine, your metabolism might slow down a bit, and you might find yourself craving snacks or sweets to replace the hand-to-mouth habit
What they are is *relatively* harmless compared to lit tobacco, which is not only a perfectly valid piece of objective assessment based on the evidence we have, and the materials science we know extremely well (although in a slightly backhanded way e-cigarette use long term might be like losing the tips of all your fingers, whereas smoking is like being run over a series of articulated lorries, that are on fire, such is the massive harm smoking does) but that relative harm *is* the actual important point
With magnificent images, unique taglines, and custom quotes, they trigger customer psychology
This is definitely a job you can do yourself