Hello Alyssa,
Congratulations to you and your husband! Speaking from experience, Walt Disney World is a magical honeymoon destination. You must be beyond excited to finally celebrate!
Right now, the best place to find Stitch is in Tomorrowland in
Magic Kingdom. There's a stage between Carousel of Progress and Space Mountain where he appears at different times throughout the day. There isn't a published schedule, but if you see Buzz Lightyear hanging around, ask the cast member who is with him if they've seen Stitch. He or she may be able to give you a hint about the best time to catch a glimpse of your favorite alien.
One thing you should be able to find a lot of is Stitch merchandise, including (maybe) the newest Stitch Crashes Disney collection. Be sure to stop at
Star Traders in Tomorrowland, but you'll be able to find souvenirs featuring this lovable alien almost anywhere.
Also, be sure to get a Happily Ever After button from Guest Relations or ask for one at the front desk of your Walt Disney World Resort. It will add a little extra sprinkling of pixie dust to your magical vacation!
Diane