We have been to 29 ballparks. Red Sox were out of town when we were in Boston. Never tried to overnight at the park. When it worked out, we parked in a remote lot and used public transportation. We have a Class B and can fit in a regular parking spot. Some ball parks wanted us to pay a lot more and park in a special bus / rv lot. I was able to avoid the special lots so far. Boston is next spring, we will plan in using the public transportation. It is quite fun to explore all the parks and sample the food.