My son is almost 15 yrs old now, so stroller days are LONG gone.
But first trip, he was 3yrs old, brought a stroller. Sometimes he used it, sometimes he didn't. But glad I had it.
next trip, 4 yrs old...we did NOT bring a stroller from home, figured if I had to I could rent one. We were there 2 weeks, only one day during those 2 weeks did we ended up renting a stroller and that was Epcot, which also was record breaking heat! (I could have used a stroller myself!)
I guess every child is different but at 4 my son really had no issues not having a stroller 99% of the trip.
He kept up great and didn't whine about the walking. If he looked to be getting tired, most likely we all were so we would stop for an ice cream break, or just relax in the shade with some water to cool off and regroup.
I LOVE not having to deal with a stroller. We don't carry a lot of "Stuff" to the parks so we never needed a place to put our stuff. We just carry it, but like I said we don't carry everything and the kitchen sink to the parks, never have really. All we carry is camera and stuff for the camera (which goes in the camera bag), a travel size sunscreen, phone and charger, key room, ID.....seriously, that is it. If it looks like rain, we will bring ponchos, but that is only if there is a good chance of all day rain. A quick passing shower we just deal with it.
My feelings is if the child is healthy, there is no reason they can't walk at 4 or 5 yrs old, and just take breaks when you need to or go catch an indoor show.
JMO. If there is one day where the child is just exhausted you can
rent a stroller, but I say let them try walking and keeping up first, They might surprise you how well they do
