If you find yourself in this situation again run to the store and get a package of single blade disposable razors and just use regular bar soap, you can lather it with your hands you don't need a brush. That will get you through the vacation, then keep the disposables for travel I usually pack 1 for every week I will be gone and then add an 1 extra on top of those. Next time though pack a brush, shaving cream or soap, and a disposable razor.
I need one of these single edge disposables per shave. I have tried to get 2 shaves per razor but it is a no go for my beard. Too much irritation. LOL.