Death Valley + Joshua Tree Trip Itinerary Feedback

Hello chubby travelers! I put together a short road trip itinerary idea, if anyone has any suggestions or changes regarding flights, hotels, cars, where to stop, what to do etc, please let me know. Its a family vacation (2 adults, 1 teen)

Day-1: American Airlines DFW --> LAS (7:00am --> 8:05am)
Pick up Sixt BMW X3 or Similar Rental Car from Vegas Airport.
Head to Death Valley to explore and come back to Vegas in the evening, check-in to hotel and maybe explore Vegas later.
Stay in Vegas for 1-night (Still can't decide whether Wynn for luxury, or Palazzo for a balance of family-friendly luxury. Even open to Fontainebleau but this is a tough decision.)

Day-2: Drive from Las Vegas to Palm Springs
Stay at JW Marriott Desert Springs and spend the rest of the day relaxing there.

Day-3: Go explore either Joshua Tree National Park for a whole day or Palm Springs for a whole day

Day-4: Go explore either Joshua Tree National Park for a whole day or Palm Springs for a whole day

Day-5: Check out of JW Marriott Desert Springs and drive to Los Angeles, spend a little time there before catching 4PM flight back to DFW on American.

Anybody have any recommendations in terms of hotels, cars, activities please let me know, trying to make this as perfect as possible with little boredom.