We always take our strollers and mark them well with ribbons, etc. We bought a $350 Peg Perego and got it a couple days before leaving. We've always used them in the airports too so we take it with us. When they were infants, we would recline the seat halfway or all the way so they could just be in there and all were OK that way
We just stayed at BWV for our second time and loved the convenience. Walk to Epcot, walk to Studios and bus for everywhere else. We have a 7yr old, 4yr old and 2 yr old. We did not even rent a car but used the Magical Express... We didn't want to mess with trying to bring 3 large carseats on the plane
Next year we will probably rent a car and do Universal and Legoland and other non-Disney stuff