Whenever I go into busy airports with crowded skies in marginal weather, I tanker an extra 5000+ Lbs of fuel, no matter what the dispatcher had planned. I endeavor a certain comfort level upon arrival in the hold over destination. Needles to say, captains at my company have a long leash. Having landed with too much fuel has never triggerd much concern...as opposed to having landed with too little. Likewise on the taxi out at an airport where you'll be No. 17 for takeoff, you'll have to pack extra taxi fuel that may not be included on the computer flight plan.
