Ratchet straps usually cost around $20 USD and you can buy them from most hardware stores. Putting your luggage directly on your vehicle could scratch or dent it, so place a towel or blanket down first. Your luggage will also be exposed to the elements and potential thieves. Avoid using bungee cords to hold your luggage in place since it’s the least secure.

Roof racks tend to cost around $50–75 USD, but higher-end models can be pricier. Ratchet straps are available at most hardware stores and only cost $20 USD. Roof racks and baskets still leave your luggage exposed to weather. They could also attract potential thieves since your items will be out in the open. You can also cover your roof rack with a cargo net to keep your things in place so they’re less likely to move around or fall off. [3] X Research source

Cargo bags typically cost around $50–100 USD. Most cargo bags also come with a lock so you can protect your belongings. Items may shift around in a cargo bag, but it may contain straps inside to help you secure your items down.

Cargo boxes are the most expensive and usually cost anywhere from $300–500 USD, but they may get pricier for larger models. Cargo boxes are also the heaviest, so you may not be able to carry as much on your roof.

Many vehicles have a load limit around 100 pounds (45 kg) but it varies.

Even if you have lighter soft duffel bags and heavier suitcases, always start with your lighter luggage so you don’t risk losing anything.

Avoid letting anything hang over the sides of your vehicle since it’s illegal in most areas. It’s okay if things extend off the front or back as long as it doesn’t affect your visibility.

Remember that you’ll probably be driving at highway speeds so if shaking your things makes them move around, then it will easily bounce around during the trip.

Take turns cautiously since taking a sharp turn with heavy items on your roof could put your vehicle off-balance. It’s illegal in most areas to have something fall off your car while you’re driving. You could end up with a fine or even jail time.

Account for the extra travel time so you can check on your luggage frequently.