I have never seen a more kid and baby friendly place than Storyland in NH, including Disney. It made Canobie Lake Park look like a dump. It is maybe more like three hours, but so worth it. All rides can have an adult with the child, every ride has a baby activity outside of it, and every third ride, at least has a bathroom, which is spotless, and with a nursing room in it, never more than 150 feet away from any point in the park it seemed. They have drop off kennels if you brought your dog, right on site. They have carriages, so you don't have to cart yours there if you don't want. They aren't all commercial, they aren't trying to sell you stuff every where you turn. The food is healthy at the food areas, and there is lots of diverse places nearby to stay. We choose camping cabins, but there are inns, motels, hotels, and outright camping and B&B's if that is your thing. We have been everywhere with our kids, and that, hands down, was the best for family's. There is Clark's trading post nearby, the cog railway, and the railroad museum to name a few.
I can't reccomend it highly enough. We are going back this year. Whatever you choose, have fun!