I went on a big trip with my LO when he was 12 weeks old. We were on EASY before which was working really well. The trip consisted for two days of driving the full days. The whole routine was thrown out the window as DS napped for the WHOLE day. Then to my suprise, he slept through the night for the first time. He slept through the night consistently while we were gone and then when we got home, we put him back to the routine as quickly as possible. His sleeping went down hill because *I think* of him being used to falling asleep in the car. Anyways, it took us a while to get back on track but it is hard to tell if that was developmental or from the trip. Either way, if you are going to travel, I would highly recommend doing it while your LO is that small!