I'd go for the Mini van. I assume you also have luggage. We usually rent a full size and it's 3 adults, one 10 yo, 1 large suitcase, 3 reg-small suitcases and 2 backpacks. It ranges from ok to a little crowded depending. It really amazes me that they call at PT cruiser a full size. for that car, we just about had to pour ourselves into after we stopped at the grocery store on the way to the resort. LOL!
If you don't want a mini van, maybe go for a premium.