CAR definitely, oh my, I remember those days with younger kids and strollers, it is hard enough getting on certain modes of transportation in the parks that require you pack up everything, my kids love to ride the train, and we always had to pack up everything. I am not a big stature mom, and carrying all that around was not pleasant, but like all other parents, we did it for many years. Our girls are 5 years apart.
We have only flown once, but we did rent a car. We have taken the bus maybe twice. It worked out, but the car was so much more convenient.
Our children had so many things, and it was so nice to come back to the car, change clothes or freshen up and then move to the next place, usually a water park.
Our daughters and I plan to use the bus system once or twice this July trip because my DH does not like early mornings. Since it is his vacation (not according to him) too, we feel getting up an hour earlier to catch a bus is not a big deal. Plus he is ALWAYS the last one out the door, which is so frustrating for 3 women that are impatiently waiting.
Our first visit was when our daughter was 2-1/2, my neighbor (a bit jealous that we were going) said, why are you spending this money, she will never remember this...WRONG, she had the time of her life and although she doesn't remember everything, she does remember quite a bit. We took 150 pictures that short 3 day trip. Wonderful memories.
Have a wonderful time....use the CAR
