Can I just double check to ask...do you need to be in the park (aside from the 7AM one) to book rides. So could we have a lay in say till 1PM outside the parks and then book all the later slots of rides? - ie. 11AM, 1PM outside the parks for a 4PM & 5PM ride.
A>
Yes, but IMO, this is not the ideal way to use G+. If you only stack G+ for the PM, then you will only be able to book (1) pass every 2 hours. If we assume the park opens at 9am, stacking = booking passes at 7am, 9am, 11am, 1pm, 3pm, 5pm, 7pm.
On the other hand, IF you can:
1. arrive in the park before 11am AND
2. IF your 2nd G+ is for no later than 10:55am, then you will likely be able to book more passes,
3. at least if you keep booking return times that are less than 2 hours out.
As the day progresses, the good passes sell out. Booking G+ is a little like eating at a buffet. The early bird gets the worm, except in this case the early bird gets ALL the juicy worms.
B>
The other thing I've gleaned is that hopping adds value to G+ on days that MK is open late, if your group can manage to hop to MK.
You can only G+ book each attraction 1 time in your first park of the day, so as you book each pass, your options in that park dwindle. Not only due to what other people are booking, but ALSO due to what you have already booked.
Hopping works very well with G+.