Hello, Sheila! Welcome to the Disney Parks Moms Panel!
The Park Hopper option works well for my family and our 'Theme Park' style. We like to arrive at the Theme Parks before they open, take a short break at our resort in the afternoon enjoying the pool during the busiest time of day, and then visit another Theme Park in the evening until the Park closes. We do always stay at a Walt Disney World Resort Hotel, as the complimentary transportation makes Park Hopping a breeze.
Every family has their own vacation style, and one Theme Park per day may fit better with your family's needs. If you choose not to add the Park Hopper option I suggest spending two days at Magic Kingdom Park, and one day each at Epcot, Disney's Hollywood Studios, and Disney's Animal Kingdom Theme Park.
Wishing you and your family a magical vacation, Sheila!
~Rachel