Our first camping trip last year, someone stole our hamburgers and cheese out of the cooler. I suspected raccoons, but there was no mess, so it was bandits of the human type. Now I lock everything up when I go camping. For bikes, we have 4. We loop one lock around the picnic table, and 1-2 bikes. Then we lock the bikes to each other, so if they want one bike, they have to cut 2 locks. I don't worry too much about seats, but they could always be removed at stowed in the truck.