Hi Vicki!
Thank you for bringing your question to the Disney Parks Moms Panel!
Walt Disney World certainly knows how to put on a fireworks show and
Happily Ever After at Magic Kingdom Park is one of my favorites! Certainly, you can view the Magic Kingdom fireworks from the resorts that surround it and are on the monorail loop. These include Disney's Contemporary Resort, Disney's Grand Floridian Resort & Spa and Disney's Polynesian Village Resort. You can use the
Walt Disney World bus from your resort to the Magic Kingdom and then use either the monorail or ferry boats to one of these. My personal favorite place to watch (outside the park) is from the beach area at
Disney's Polynesian Village Resort.
There are a few restaurants that offer spectacular viewing, as well. At the Polynesian Resort, 'Ohana is a great place to dine and watch. Narcoosssee's at the Grand Floridian is a good choice and California Grill on the top floor of the Contemporary Resort offers a spectacular view of them!
Since you're going to Disney's Hollywood Studios, be sure to catch
Star Wars: A Galactic Spectacular. It's also an amazing use of fireworks, lasers, projections and more!
I hope this helps! Please let me know if you have any other questions.