From the Hollywood Studios calendar, clicking on the individual dates for your vacation will give you the entertainment listing. The good news is that Fantasmic! is playing almost every night of your stay. The later show will be the less crowded. Crowded? Oh, that's the not so good news. This week will be extremely crowded in WDW.
Fantasmic! is showing on these nights:
April 17 8:30 p.m. and 10:00 p.m.
April 18 8:30 p.m. and 10:00 p.m.
April 19 8:30 p.m. and 10:00 p.m.
April 20 8:30 p.m. and 10:00 p.m.
April 21 8:30 p.m. and 10:00 p.m.
April 22 8:30 p.m. and 10:00 p.m.
April 23 8:30 p.m. and 10:00 p.m.
Now, back to those crowds. Be at each park for opening and tour efficiently in the morning. This is your best time of day for getting a lot of attractions done. You'll be ahead of all the guests still sleeping! When the park gets crowded during the afternoon, head back to your resort for a rest. You'll then want to return to the park and continue your touring. A good strategy is to visit the "Must See" attractions during a parade as the crowds will lessen for a while.
Enjoy!!