Just throwing this out as a possibility -- not sure if it even would work. Instead of paying an extra $60 to hop for one day you could consider buying an extra one-day ticket -- especially if one of your days will be a value day in January. So, you'd get a three-day base and a one-day non-MK value ticket. You'd set the one-day up on a separate MDX account. If you decide to hop one day, just use the one day ticket for the second park that day. If it's too much for you, you can save the one-day ticket for a later trip or upgrade it for a later trip. It doesn't expire until the end of next year and even then you keep its value. I don't think there's any prohibition on using two different tickets on the same day in two different parks, they just can't be the same multi-day ticket. You are paying an extra $39 over hopper prices, but it adds flexibility don't need to stop to upgrade, retain value if you don't use it, and I think maybe you'd even get to make a second set of fastpasses for the afternoon. Possibly not wroth $39 but just a thought.