For the first timer who asked about hoppers....you might be right about not hopping...If it's your first time, there is enough in each park to keep you busy. AK closes fairly early, except on EMH night (if you are staying on property), but otherwise, depending on the time of year, and how early you start your day, you'll probably be quite tired at the end of your day, and won't feel like you are missing out. Illuminations is just a name to you, and you'll most likely have sensory overload by 9pm. Plus, there's always the option of an evening swim.
However, after you've been to WDW a few times, you learn certain things. Somtimes oddball things happen, and it's better to bail for another park. (Like you discover thousands of student groups are there for the day, organized by matching t-shirts...and ALL of them chose to go the MK for the day). If you're new though, you have no way to compare the crowds.
Even for us though, we still don't get to do EVERYTHING dring our six day stay. That's one of the fun things about WDW. So yeah, if it's your first time, save a few bucks...you'll need them for souveniers!