I am Water Only, but from what I've read about BS/ACV it sounds like you are washing your hair too often. Baking soda can have the same effect as shampoo as far as stripping your hair if you use it too often and your hair will go into sebum production overdrive.
Before you quit think about why you started no poo in the first place. Was it just an experiment? Do you want to stick it to the man? Was your hair awful and you're trying to improve it?
There are many different ways to go no poo. Some people start by diluting their shampoo and using it less often. You can cut your shampoo consumption in half that way without sacrificing much. If you're trying to improve the health and texture of your hair Conditioner Only is a good option to try. A lot of people have problems with baking soda (especially people with dry, fine hair that is fragile like mine) and find that water only is the best way to wash. You can run into a whole host of complications if you have hard water, and some peoples problems are cured by using filtered or boiled water followed by an acid rinse (which could be diluted ACV, but could also be white vinegar, lemon juice, or tea).
There are also lots of ways to make your hair look better on in between days. I have short hair and I can't put it up so before I go out I "brush" my hair with a hot wash cloth and follow it up with a cold water "brush". It takes about 5 minutes and breaks up the stringy greasy look. If I follow up with a boar bristle brush my hair feels clean and looks like it has some of that "bed head" product in it. There are a lot of options for you to try before you quit!
If it is important to you to look your best on your vacation, you can always use shampoo and then try again when you get back.