I need help on planning a trip to Walt Disney World. When is the best time to go to Disney World?

I need help on planning a trip to Walt Disney World. My dad needs info on the Star Wars weekends, the hotels, and the parks. When is the best time to go to Disney World? I need to know this because I will be gruaduating from high school and my dad promise he will take me to Disney World as a gruaduation surprise. Also, I need info on the Star Wars weekends. Am I allowed to dressup for the Star Wars weekends? I need info on the best price on 2 airline tickets that is flying from Charlotte to Orlando, 2 tickets to Disney World and an onsite hotel room. Is there a gift shop that has a Anakin Skywalker shirt? Because I want a shirt that has my favorite Jedi on it. What are the best rides at Disney World? I wanted to get my picture taken with Tigger or Stitch. Also where can I meet Anakin Skywalker at the Star Wars weekends? I will tell my dad this info so he can plan our magical trip to Disney World! Thanks for your help!!!! I will go to the Star Wars weekends as Darth Vader!