We go for 2 weeks every year. which adds up to 13 days on property. Before our trip we make a list of what we want to do, and 2 weeks later we leave and still not get everything done that we wanted.
For our family , the longer trips are more relaxing, we go early, leave, when everyone gets hot or cranky, we leave and go back to OKW and swim/ cool off have lunch and then go back to the parks later in the day. It's hot so we take it easy. We don't push, or wait in long lines because we know we can come back to an attraction later.