A regular flashlight won't be a problem. You *could* get some extra attention if you try to carryon one of those 2-ft. long steel flashlights that double as billy clubs.
One thing that folks should be noting about Frances as opposed to Charley: Charley was a very compact and fast-moving storm, unusually so, and that was a good thing for those in Charley's path, even though the Cat4 winds were very violent. Frances appears to be a very different species of storm. Remember that the Cat rating references the speed of wind rotation, NOT the speed of lateral movement. Nor does it reference the actual size of the storm in terms of how wide an area is covered by the sustained wind pattern. A big, slow storm is much more dangerous than a small, swift one, even when the rotation speed is very similar.
People who live for long periods in hurricane-prone areas come to understand that although the power of the wind is very frightening, it is not as dangerous as the power of the water. It is the water that is most likely to kill. The larger the area and the slower the lateral movement, the more water a hurricane will hold, the more water it will drop, and the more water it will push before it. Right now, the prediction for the overland lateral speed of Frances is about 10 mph; which combined with the sheer size of the storm system (a 165-mile-wide swath of hurricane-force winds) means that if it sustains this formation, when it hits, the eyewall will appear to sit over a given area for up to 10-12 hours. Anyone who experienced Charley and decided that a Cat4 wasn't that bad b/c the worst of the intense wind and rain only lasted for an hour or so will be getting an ugly shock if they find themselves in the path of Frances as a Cat4, even if it is a glancing blow instead of a direct hit. Unless a miracle happens and she breaks up &/or turns back to sea, I believe that Frances is going to be much worse than Charley.