Summer’s here. School is out of session. And many folks are flying or taking to the highway for vacations. Whether you are renting a car for a roadtrip or once you land in your final destination, its important to know what fees you need to pay, and which you can safely ignore. You may be able to save hundreds of dollars each week.

One big fee every rental company pushes is their in-house insurance coverage. This can be over $30/day. But most renters don’t actually need it. What if you’re involved in a crash? If you own a car, your regular insurance likely covers rental coverage. In addition, many credit card companies offer collision protection for rental cars.

You will want to do your research before declining insurance through the rental car company. Confirm with your regular car insurance that it includes liability, collision, and comprehensive coverage for rentals in your destination. Also check with your credit card companies to see which one has the best coverage.

Some insurance companies and/or credit cards won’t cover rentals in certain other countries. Ireland, Israel, Italy, and Jamaica are a few that can be problematic. I know that when I rented a car in Mexico my credit card company had me covered, but the Mexican government required I pay for insurance anyway. In addition, you may decide the coverage is better than the hassle of filing a claim with your insurance company if you crash. But if everything does work out, you could save over $200/week opting out of the rental car company’s insurance.

Another key to getting the lowest possible price is choosing your rental car company’s “mystery car” option. Many companies will give you a huge discount if you agree to drive away whatever happens to be on their lot. Consumer Reports saved $300 at a Los Angeles Hertz with this discount.

Note that “mystery car” might mean a full-size truck, or even an EV. Because EVs take longer to charge than gas cars take to fuel up, many of the larger ones are poor roadtrip vehicles. But if you are in a hotel that has chargers and want something to drive around town, you may find an EV a nice way to save money.

See more hacks to saving money on your next rental car in the video below: