Since most of my fishing trips are two to three hours, I never carry any extra line spools anymore. I make sure my reels are filled before the trip, and I've never needed to respool my reels while I'm on the water. If I were fishing for a much longer time, I'd probably carry a spool, or if I were travelling to a new lake, or out of town of course I'd pack extra line. But, for trips close to home, I never do. Do you carry extra spools of line as part of your tackle?