Upgrading a park ticket question

[mjatgoofy]

Planning a short trip in Feb. Will be purchasing a 3 day park base ticket(room package reservation) but want park hopper and Genie + for just day 2 and day 3. Can I do that? Do I upgrade the base ticket on each given day when I get to the park? Thanks

 

[scrappinginontario]

Park Hopper must be purchased for entire length of ticket or not at all.

Genie + can be purchased in advance for all days or, if only wanting for specific days it can be added each day, after midnight.

 

[lanejudy]

I believe the hopper add-on costs the same for 2 days or 3 days -- $75. So that's a moot point.
As PP says, Genie+ can be added for individual days - just do it each morning that you'd like to use Genie+.