I was just asking a question related to this on another thread. In the past I've booked only packages but next time I'm going RO with tickets separate. Here's why.
I bought a package last September for this July, 7 days at Pop with 10-day tickets (we're doing a split stay adding a couple nights on at Contemporary). When discounts came out this spring, I was so disappointed that they would not save me money. That's because I'd have to buy park tickets again, at the higher 2017 rate, which would offset the room discount.
So disappointed!