My 5 year old (who had just turned 5 a couple weeks before) did walk the entire vacation.
It never even occurred to me I should bring a stroller for her. In her 5 year old opinion, strollers were for babies, not a big girl of 5.
Well, my just about 6 year old does not care what people think of her and is willing to ride in the stroller if she gets tired enough. I bet some on here would probably shun me that she's still in a 5 point harnessed car seat too. My DD is an extremely active, healthy girl so I imagine that she will mostly walk but it's there if she needs a break. And, I only care what my daughter does and having a good time at Disney and don't really care what anyone else chooses to do. Heck to all the rude judgemental people. Life's too short
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Do what is best for you and your family.

But I do have some insight for you....I am here now! And I have a Double city elite for my kids!! From Kingdom strollers actually...they are very easy to deal with and the stroller was here when it was suppose to be. We have three kids...one is almost four...and is 42" and weights about 40lbs...DH and I are trying to remember now...but we know he is close. Then we have a 6 year old that is very tall for her age (taller than any other girl in her class) and weights around 57 lbs....and they have fit just fine! It's been a life saver...and they have even fallen asleep in it on more than one occasion. No we don't look odd pushing them either...heck tomorrow is day 10 of disney parks...plus we have done three days of others....so if I could sit in it I would!! lol I would rather push them and have a place to store all our stuff than not have one. We also have an 8 year old that is at least 55" and weights around 77 lbs...and she will sit in it for little periods of time if her feet hurt...or its just too hot and she needs a break. So it's worked out great for us...we have said it to each other a dozen times that it was so worth the money. When I called and booked the stroller I talked to Matt and he suggested this one for our families needs...he was very helpful, prompt and friendly. It also comes with a parent console...that we have had loaded to the max our whole trip...a little cooler that fits on the bottom and rain gear that we have put up a few times....a couple for just in case moments when we headed for a long line and the sky looked ominous! Good luck and have a great trip.