We want to take our adult kiddos (23 yo) to WDW and Universal. We have been to WDW many times. We plan on 3-4 days at WDW and 2 days at Universal. Is 2 days at Universal enough? We love Harry Potter but want to see other things also. Which tickets are best to purchase? We were thinking of staying on site at WDW and catching an Uber to Universal. Any suggestions on tickets, days, places to eat, all the things Universal are greatly appreciated! Our daughter is the only one that has ever been to Universal and it was 5 years ago. Thank you!!