Hi Maura!  Congratulations on being halfway to your goal!  Overall health and fitness is the best gift you can give to yourself and also to your loved ones.
I think you deserve to reward yourself!  Here are some reward ideas that don't include adding any calories to set you back!
1.  Tours and Experiences at Walt Disney World:  The tours are fabulous!  My favorite one is Disney's Keys to the Kingdom Tour.  It is at Magic Kingdom and it's so interesting to learn about the history and attention to detail that you can easily overlook throughout the park. 
2.  Spa Day!!  Treat yourself to a day at the spa at Disney World.  All of the services are first rate!
3.  Specialty Cruise:  Take yourself and your loved ones on one of the many specialty cruises throughout Walt Disney World.
4.  Shopping!!:  Of course, you will need some new clothes for your new body, so you could spend the day shopping at Downtown Disney. 
I hope one of these ideas sounds great to you!  Of course, on your new journey for a healthier body, you should consider signing up for one of the runDisney events!  You get to combine exercise with Disney, and run (or walk) through the most magical place on Earth! 
Please let me know if I can help you in any other way!