If you're flying into PSP and plan on spending most of your time at the Ace, probably not. The Ace has free bike rental to explore Palm Springs, so you'll really only need a car if you make a longer day trip.
Families of all size, age, and species are welcome; Cormac and Volpina will certainly be there! If at some point you'd like a babysitter, there are two services that are recommended by the Ace: - Desert Super Sitters: www.desertsupersitters.com - Aunt Fran's: www.auntfransbabysitting.com