i would much rather get nuts and some dried fruit blend vs. protein bars. but let's say you are going hiking or fishing for hours and hours and want something on hand then bars make sense cause they won't melt and it doesn't matter if your hands are dirty.
i like the 200 calorie bars they sell at the health food store, they cost $1 each and do the job. read the ingredients.. they contain 3 egg whites, peanut butter, etc. natural stuff