We are usually visiting when DL opens first so we start our day there. Then we hop over to DCA. Sometimes before our afternoon break, we will hop back to DL just to grab another fastpass for later. When we come back after break, we start again with whichever park best suits our plans, finish up whatever we wanted to do for the day, then hop back to the other park to finish out the evening. So I guess that's 2-3 hops a day for us. I can't imagine having a whole day there and not parkhopping at some point.