I have 2 DD's, who are now 7 y.o. & 3 y.o. (almost 4), and we have taken our own single Combi, rented a City Mini Double, lugged our tandem Gracco from home, and went back to renting a City Mini Double. And, here's what my DH and I have learned:
-When our oldest DD was little (think 1-3 y.o.)...