Before you purchase Disney World Park Hopper tickets you should ask will your family or friends have sufficient energy to visit more than 1 Disney park in day? For numerous people especially with very young children the answer is no. The parks are enormous and it can be exhausting running around all day especially in the hot Florida sun.
I usually advise to wait until your already at the parks before you add the Disney World Park Hopper tickets. Purchase the base Magic Your Way tickets beforehand at the most discounted price you are able to find online. Only then, after you have arrived at Disney World, if you or family members find that they wish to hop to a 2nd park one day, then just find the Disney ticket gate and add the park hopper option right then and there.
Because it's a straight cost of $52 to add park hopping per ticket, it doesn't matter however many days that you have previously used prior to adding it. Since it costs the same amount to add this option before or after you arrive at Walt Disney World you should just hold off until you get there.
