We just got back from WDW with our 5 1/2 year old and 22 month old. As everyone else said if you're not bringing a good quality stroller from home rent one from an outside company. Your toddler's schedule may be different while at WDW especially if there is a time change. Don't make firm plans about when you will get to WDW each day. One of the days I planned to make rope drop at Epcot since our sons usually are early risers my toddler slept late which he never does. I ended up pushing back our dinner reservations and we were all able to watch Illuminations from the patio at Rose and Crown. Bring lots of snacks and be prepared to tag team it during sit down meals. I spent half of my meal at Coral Reef chasing my suddenly wired toddler around the restaurant. My dh spent the other half doing it. At one point he tried to slide down the stairs on his belly. He quite often wanted to eat an hour later than we wanted to eat and didn't want a snack so I had to be willing to stop and get him a counter service kids meal (usually chicken nuggets) for him. Another thing that really helped was for us to split up and have one of us ride the big rides with big brother while the other was taking our toddler on smaller rides. My final piece of advice is to bring the stuff needed to recreate her bedtime and wake up routines as closely as possible. He likes some milk in a bottle while reading his bedtime books and before I brush his teeth. He only wants certain books at bedtime so I made sure to pack them and a bottle. I learned the hard way the first morning that he would melt down if I couldn't give him some milk when he woke up so I made sure to keep the room fridge stocked with it. Once he got that he was in a good mood for the rest of the morning.