You stay out of the Old City, which is mostly targeted at tourists anyway, and tour markets in some of the more remote suburbs of Jerusalem. You're able to secure a good quantity of high-quality tinned meat, some tinned and dried fruit, and superior tents and bedrolls. This should all make the expedition significantly less arduous.
You are in your hotel room admiring your purchases when Esme appears to tell you that the expedition will soon depart. You put on your dusty, well-worn field clothes, pack your belongings, and head on down to Esme's car to be whisked off to the expedition meeting point.