My husband and I will be staying off site for 5 days 12/9 to 12/14. We do not like the thrill rides but enjoy the shows and less intense rides. My husband is a Harry Potter fan. We spent 1 day at Universal about 10 years. Planning on getting the buy 2/1free ticket. Would you get the park-to-park or 1 park per day? The difference in price is about 40.00 more total for both. What are the advantages of the park to park?