This is where the little things can be caught and corrected before they turn into big things. Develop a relationship with your rigger. Having the same person packing it every time will increase the likelihood that the little things will be found. Don't rely on your rigger to catch everything though. Be prepared to pay a little extra if you want your rigger to inspect your main.
Car trunks can get hot very fast and heat is another enemy of nylon.
For the same reason, don't leave the gear in the car for an extended period of time. At home keep it in a gear bag in a dark bug-free closet. Although bugs won't eat nylon dead bugs can produce chemicals that will. Protect your rig from thieves by recording the serial numbers, colors and size specifications and take a clear color photo of each piece of equipment as soon as you receive it. Theft is another reason not to leave your gear unattended in your car.