We bought this stroller specifically with this trip in mind. However, DD isn't fond of sitting in it and tends to push her twin leading to some very loud screaming matches between the 2 of them (and then big brother has to get his say). With such a young one, you may want to consider a tandem stroller (front/back) instead of side-by-side. We used the Graco DuoGlider until the twins were 1 -- it held their carseats as well which made it very easy for us to use. Unfortunately, when they turned 1 and were consistently SITTING in the stroller itself, they would kick each other in the back making it necessary to buy a side-by-side.
The biggest problem with the InStep Safari (that we've noticed) is that it's VERY difficult to get through doors -- it's considerably wider than our other side-by-side stroller. But it's also MUCH easier to push.
Good luck!!!!!