I say do a hybrid….stay as much as you can on Phase one, but if this is causing you immense stress just increase your calories a tad and only add in like some additional fruits like a banana. This can help you stave off any temptations that are far more detrimental like say cake…Does this help? I think the main thing is don’t stress out and not enjoy yourself, but do remember that you will feel better if you don’t eat a bunch of foods that your body may not agree with. Just do your best! I also have an article that may help:https://my.ps1000.com/travel-survival-guide/
Have a great vacation!