We (4 adults and my 15 month old) will be staying in Anaheim in mid Sept to go to Disneyland but I really wanted to take my daughter to Sea World. I have read posts about taking a train down to Sea World to reduce the stress of driving (plus it seems that it would be faster?). Originally we were going to rent a car the whole time we were there but now I am thinking that it won't be necessary since the days we go to Disneyland we will be walking. If we catch the train then we won't need to rent the car to go to San Diego either. What train are we talking about? (So I can look for some info online about it) and how far is it from the station to Sea World. Also, how far is it from Sea World to In n out burger (I am in LOVE with In n Out and must have at least one while I am there). Since we'll have a young child, is it better to just rent the car for the flexibility?