Actually, some BOBs may be heavy in theory and short on reality, esp the super-light ones.

Use your BOB for camping and find out if it has some serious shortcomings.

In fact, why not try using it as your only source of camping gear? Keep a small notebook and pen handy to jot down thoughts as to shortages and excesses. That would be a better time to find out what the flaws are than during a life-threatening situation.

While you're out, consider the possibilities and match your BOB against them: Bad weather, injuries, sickness, extended time you might be dependent on it.

Sue