Betty,
Here is where I would recommend you go;
- July 3 - Magic Kingdom
- July 4 - Hollywood Studios
- July 5 - Epcot
- July 6 - Hollywood Studios
- July 7 - Magic Kingdom
- July 8 - Animal Kingdom / Water Park
- July 9 - Magic Kingdom
I send you to the Hollywood Studios on the fourth for a particular reason. Guest flock to Epcot and the Magic Kingdom because they have regular fireworks. Kind of part of the Independence Day experience. But Hollywood Studios has it's own festivities, often overlooked and under appreciated.
I like the trip to Epcot on the 5th, because you can Monorail to the Polynesian for dinner, then monorail right back to the park.
I am kind of torn on your last day. A return visit to Epcot might be nice, as opposed to a 3rd day at the Magic Kingdom. But it is always nice to end your trip on a day at the iconic Magic Kingdom. Magic Kingdom will be the more crowded of the two, largely because of the evening Extra Magic Hours. If you can keep this last day somewhat more flexible, you may decide to change destinations.
Let me know if I can help with dining suggestions!
Have a magical vacation!