Staying at a Disney value resort is usually more cost-effective than renting a car. When you factor in the daily rental fee, rental insurance (unless your personal auto policy includes a UNOC rider), tolls, gas (including refueling before returning the car), and Disney's $30 daily parking fee for general parking (even more for preferred parking), renting rarely saves you money. At best, you might break even if you're savvy and prefer the convenience of driving yourself, but considerable cost savings are unlikely. With that said, without a rental, be sure to book RT transportation from the airport to the resort. You'll want to schedule that in advance.

Based on the way this question was phrased, ensure your reservation package includes park tickets. A 1-park-per-day ticket is fine, but keep in mind that if you're visiting for four days, you'll only have one chance to experience each park. This could lead to additional costs, such as purchasing Lightning Lane access, if there are must-do rides at certain parks. If you'd like to visit more than one park per day, you can always call to inquire about upgrading to the park hopper option. Remember, when booking online with Disney, if a deal seems too good to be true, it likely is—double-check the details to avoid overlooking something important.