You wanted to know if it's okay to take a very small baby on a very long road trip. And my first piece of advice to you is to talk with your pediatrician, because there are some things they will consider. The first is your baby's health history and circumstances, like some babies have health conditions that may affect their ability to travel to certain places or go for long periods of time. A baby less than 2 months of age hasn't received their first round of vaccines and so the destination will be important too. Your pediatrician will likely want to know where you're going and can discuss risks in that area to determine if it's safe for you to take your baby there or not. If they do give you the green light, just make sure that you're washing your hands frequently and using an alcohol-based hand-sanitizer when you're out and about, because if you keep your hands clean before you touch your baby and your baby's things, then the likelihood of them catching something is much slimmer than it would be if your weren't doing those things.
If you do go on the road trip, keep in mind that a baby will need to eat every 2 to 3 hours. And it's important to stop and feed your baby every 2 to 3 hours and make sure that they get their diaper changed, that they're not sitting in a wet or dirty diaper for prolonged periods of time. And you will be tempted to feed your baby while you're driving in the car and just take them out of the car seat and feed them while you're driving to save time, but don't do it. Accidents are never planned and if a baby is not properly restrained in the back seat in a rear-facing carseat with the buckles buckled properly, they are not safe during an accident. And so even though you're going to be tempted to do it, make sure that you don't get your baby out of the carseat while you're driving, that you're taking frequent stops, and making sure that you move around too, because adults are at risk for blood clots if they're sitting in cars for long periods of time, so it's actually good for you both. This will make an already lengthy road trip even longer, but it could be fun, because you might stop and see things that you wouldn't have otherwise.
When you do get out of the car and go into stores or different places, if your baby is asleep in the carseat, carry the carseat in with you and never leave your baby unattended in the car. If you are going to go in somewhere and leave your baby in the car, make sure that another adult is present, that they can watch your baby, and also make sure that the car doesn't get too hot or too cold. Another piece of advice I have is to sit in the backseat with your baby, because when they can't see you, they cry, and they feel lonely, and they're sad, so it's likely to go more smoothly if you're in the back seat, and it also makes it easier for you to pop in a pacifier, or read a book, or shake a rattle to distract your baby. Also bring some music along that they'll like and that you'll like to keep you both entertained during your long drive. Have fun, and if you have more questions in the future for me, feel free to ask them on our Facebook page at http://www.facebook.com/IntermountainMoms, and recommend us to your friends and family too.