We stay at a WDW resort. Use DME to get from the airport to the resort then get a one way car rental from the disney car care center and drop it off at the port. Our family consists of three and a full size runs us about $80 and fits our luggage without any issues (usually one garment bag, two large suitcases, a couple carry ons and backpacks).
If we have APs or tickets at the time we will dine at a resort near whatever park we want to go to that night and usually end up seeing one of the night time firework shows.
Dinner at Cali Grill and Happily Ever after...Dinner at Jiko and River of Light, etc etc etc