We started taking my DD7 to WDW when she was 2-3/4 and of course she's loved it everytime! She doesn't really remember those first few trips, but enjoys looking at the pictures and my telling her about the trips. Also, as others have said, seeing it through her eyes was magical.
As to the issue of the stroller, this will (probably) be the first time we don't take our stroller (and yes, she is 7 now and will be 8 on our next trip). I will admit that the main reason I bring the stroller is to save my back! My DD is petite, only 46" and 47# so she still fits in either our stoller, or one from Disney. Most of our trips it's just me47, my DM67, and my DD. It's left to me to carry all necessary items when we go to the parks. Cameras (still and video), snacks, water, towels, water shoes and bathing suit-for water play, etc. and I am old enough that I wasn't raised in the generation of people who carried backpacks (When I went to school we still had lockers!

). So, I hate carrying one around! Can't stand it-especially in the Florida heat and humidity!

My DM likes to carry as little as possible, so she's no help

and while I know we can rent lockers, that means having to go back to the lockers to get things and I still have to carry my cameras. Plus I believe the locker rental is about the same $ as a stoller.
For the times we are just going to one park for a few hours, not having to push the stoller around is great, but for those longer days, I'm really going to miss it.

The best stroller time we had was a few years ago when my adult niece, who was a DLR CM came, and we got free strollers! We got the double ones and by the time all of us put in our stuff (that trip there were 5 A (all female) and 1 K, there was just enough room for DD to sit! It was great not having to haul anything, and leave our shoulders free!
Also, the stroller has been a life saver (back saver too!) on those times when my DD conks out. Since we are from Calif., sometime the time difference gets to her and she falls asleep during the day, once even on a ride, KS-first thing in the a.m. When this happens, it's wonderful for her to be able to hop in the stroller and take a break. There is no way I can carry her, for any distance, without it killing my back. By the way, my DD is by no means lazy, and she definitely doesn't have a weight issue. In fact, she loves to "extracise" as she calls it, and she's in constant motion, except when she's sleeping

!
I'm also going to miss using the stroller to carry our carryon items to the plane. Again, it's always me who does all the carrying-some times I feel like a pack mule! Oh, if only I had a big, strong, man to help carry things!
Have a great time and hope this helps!
