DS, at 3.5, is approaching the 35 lb. weight limit for rear-facing in both of our car seats. He is consistently weighing in at between 33.8 and 34.7 lbs (depending on what he's eaten/time of day, etc.). In about 1.5 weeks, we'll be taking a trip which will involve about nine hours of driving each direction. DS is still comfortable rear-facing and he's always been a good traveler on our long car trips. On a recent trip, though, we did forward face him (we were flying, and it was easier to FF with our travel car seat) and he did fine that way too, but that was only for shorter trips (an hour tops). So, experienced Mamas, should we turn him now or wait till we return from our trip (so about 3 weeks from now)? Thanks!