There are two size boats that serve the WL/MK route. One is the large cruiser(same as the 2 for FW), on that boat you will probably not have to fold the stroller and will be able to roll it right on. On the smaller launch(same as the ones that run the CR/WL/FW route) you will probably have to take the kids out and fold the stroller, there is a step down into the boat so you will not be able to roll on. Don't forget that WL also has a bus for MK, althoug you would have to fold the stroller, it can be faster and if the weather is cold or raining it may be a better choice.