Planning a vacation or trip can be a fun anticipatory experience.
Planning the transportation for the trip can take the wind out of your sails, though.
Sites like Kayak and Expedia can help you search multiple car rental options at once. They often present you with a grid of different possibilities and rental companies.
After checking the aggregator sites, it is good to check the rate directly on the rental companies website. Sometimes, car companies offer you a better deal if you book directly with them instead of an aggregator.
Getting a comparable vehicle can help you save money, but getting one that is too small for the number of passengers and luggage you will be carrying is a recipe for an uncomfortable trip.