We organized a big family trip before my sister and I both knew we were pregnant. She took her 4 month old and I took my six week old. No finer place to recover from childbirth than at Disney I say! We had a great time but we do go often. As another poster said, if this is your trip of a lifetime, wait two years. If not, have a blast! Enjoy snuggling with your little one in one of the most child friendly vacations spots in the world. An 18 month old will love so much about it - the characters, the pool, pooh's honey pots, dumbo, small world, the lizards on the sidewalk, the splash pads, the mickey bars, the animals, the shows... Enjoy!