If you don't eat regularly you will get liver dumps - your body believes you may be starving to death as it is several hours since your last meal and converts glycogen from the liver to glucose. I can sometimes hit over 7 on an empty stomach.
I carry snacks - low carb protein drinks, macadamia nuts, almonds, walnuts, hazelnuts, pecans, brazils, cheese chunks. During the day I need something to eat every 3-4 hours to keep my blood sugar relatively stable.