SWW is awesome. We've been at least one weekend each of the last five years.
My suggestions:
If you are planning on getting celebrity autographs, get in line by 4:30 a.m. It is worthwhile if there is a celeb you really want to meet. This is especially worthwhile if you want the celeb to sign something unique (I had Ray Parks sign a Darth Donald statuette.) some celebs will only sign their stock photo, though.
Go to the merchandise tent early. This is especially true on the first day of the first weekend. There is some limited merchandise that will sell out in hours.
When you walk in the park, there will be a booth where you can get a schedule of events. The schedule contains the times for the panel discussions and celebrity shows. These start usually after the motorcade and are the best park of SWW. The schedule is usually online before the weekend. Plan your afternoons around the ones you want to attend. Get in line early for the ones you really, really want to see.
The motorcade is so worth it. Get there early to reserve a good viewing place.get there super early for a viewing place in the shade.
Hyperspace Hoopla was great. Too bad it's not coming back. The fireworks should be a great replacement. Can't wait to see them if we go ( we were going to take this year off, but DH has recently raised the possibility of a SWW trip).
Lines for Star Tours will be longer than usual but not obscenely long. Budget FP+ with that in mind.
Lines for SW characters WILL be obscenely long. Seriously, the line for Chewbacca can be hours. Keep in mind that it's hot, and the characters are rotated to a break every 15-20 minutes, making waits even longer. Plan a just 1-2 characters per SWW day if this is something you are interested in. To hope for more will result in you doing nothing else except standing in character lines.
Enjoy the SWW snacks that they sell at different locations around the park. Always something fun and tasty.
Stay hydrated.
Wear your SW tee shirts, but remember that it will be hot. You may not want to dress up like you might for a convention.