Hi there, Susan, thanks for sailing through planDisney! I'm happy to share more about 
booking onboard activities!
If you have yet to book your cruise, you can get an idea of onboard activities on the 
Disney Cruise Line website. However, if you've already booked and fully paid, you will be given a date that you can begin booking activities, excursions, and check-in. Opening dates to book are based on your 
Castaway Club Membership level. Make sure to download the 
Navigator app as this can all be done from your mobile device or you can log into the website. 
I'm excited to sail on the 
Disney Wish myself later this year, and can't wait to experience dining in Arendelle, exploring the worlds of MARVEL, and stepping back into time at 1923. Not to mention, hopping onto the 
AquaMouse on deck 13 is going to be exhilarating. Many onboard activities don't require a reservation, including the deck parties! 
You're going to have an incredible trip, Susan, and I hope this helps you get started with the planning. Make sure to follow Disney Cruise Line on 
Instagram for fun announcements and upcoming experiences! And for sneak peeks of what it's like onboard, check out the 
Disney Parks YouTube account. If you have any other questions before you sail away, please reach back out. We're happy to help!
Bon voyage!
Camille