Aha! We just had a trip with a 2 year old and an 8month old. We used Touring plans and it was well worth it! Easily the best $15 we spent! At the top of the plan generator, you can adjust your walking speed... Touring Plans tools let you build in breaks just like attractions (a must for a toddler) and also give you an opportunity to get a sense of how long things will actually take including travel times, waiting in line, and even down to time estimates for rider swapping. We didn't always stick exactly to our plan but used them like guidelines (think pirates code) It gave us a good sense of how long waits would be at different times of day. It also forced us to prioritize what was a must do vs a bonus. You know your child best, but our kids are definitely morning and evening friendly and get cranky in the afternoons and at night. This let us make the most of the times that worked best for our family.
If you play with different rides at different times or use their optimize feature (basically ask the computer to pick the best times for your selected attractions), you really can cut down on your wait times tremendously. To give you an idea: On Dec 23rd with our crew in tow we rode Peter Pan, Teacups, Dumbo, Pooh, Thunder Mtn, Splash Mtn, 7DMT, Under the Sea, Space Mtn, Taking a long Breakfast snack break , Watched the Christmas Parade at the front of the rope, and ate lunch at B.O.G. and were done by 1PM... This was a massive crowd day and obviously that includes rider swapping for the Big Kid Rides. We would have done more but unfortunately my wife got a really nasty 24hr virus that cut our day short...(obviously the unexpected happens with little kids, but we knocked out all of our must do's in about 5 hours)