Do you plan to stick with Phase 1 while on vacation? If not, I would restart Phase 1 when you get back. I think that people that are successful restarting in a Phase 2 mindset and eating way are ones who have been very successful with SBD over a long period of time. If you plan on going on vacation in a "vacation mode" of eating, then you will have many cravings to rid your body of and Phase 2 may not do that for you.
Does this make sense at all??