See how u do, i went to Egypt for 2 weeks in November and one day i had 1 piece of lettuce and 1 bite of chicken, thinking i would end up eating, and the opposite happened, i stuck to my diet for the whole of 2 weeks 99.9%.
It is hard work though, the only 1 danger is, whether one would want to go back to the packs after eating yummy food, only do it, if u haev the willpower to continue as soon as u come back .