OP: Just so you're aware. At 7 a.m. you can book a maximum of 2 things: 1 G+ selection and 1 ILL (Individual
Lightning Lane). To further clarify, Individual Lightning Lane selections are NOT part of G+.
Also, you can book an ILL in a park other than your reserved park only if you have park hoppers
If you wanted to purchase the ILL for RotR, for example, that is a separate fee from G+, where you'd book your other DHS selections.
If you have interest in doing RotR and FoP (at DAK), these are both worth spending your ILL money on, since the lines for both these attractions can be ridiculously long.
Anyway, after you book your G+ attraction at 7 a.m., you cannot book another one until 2 hours after the park-opening time of the park you have reserved or even your hop-to park. So you can go back to sleep!
Meanwhile, do just a little bit of reading about G+ and ILLs. You need to have a plan unless you don't mind standing in lines. Long lines, since we're talking Christmas week, I believe.
If you have the funds and would like to stay up late and there are still tickets available, you might want to consider doing the Christmas party at MK instead of having a regular park day there. That way you could just sleep in, not worry about G+ or ILLs and enjoy MK that evening.