Any time you take stores south of Hatteras you're at risk for infestation. I recommend transferring dry-goods such as flour, cereal, and the like out of their original containers into air-tight containers. The nasty details are that you're bringing the roach eggs on board in the dry-goods. The humidity, if left in original boxes, is sufficient to aid in their hatching. Don't worry about their consumption; you've eaten worse without knowing it!
Once infestation starts, ie...you see ONE roach, take measures immediately to eradicate the little suckers. That one roach is always the tip of the iceberg. Stories of being able to train them to keep you awake on night watches have never been confirmed to my satisfaction. (g)
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.