we drove to virginia when Emma was 18 months. It was about an 12 trip ( due to traffic and stuff) We left around 8 in the morning. Emma took a nap about an hour into the trip and slept for a 3 hours. After she woke, we had lunch around 1. She then played with her toys for an hour. then she watched her dvds. That was till about 4 ish.. until then we didnt even take her out of the car seat. We stopped at a rest stop and changed her diaper and let her run around. the next 3 hours were harder because she didnt want to get back in and when we stopped for dinner at 6 pm she was a pill. We got to hubby's uncle's house around 8.. hubby and I were wiped but she was wired!
this past april we drove to Disney from MA. It took us 2 1/2 days.. Emma ( just short of 3) was great. We had our camper, so we stopped a bunch. She had her dvd player and a ton of toys. we stopped ever couple of hours for gas and emma got out of her seat to go potty. she napped and played and when we finally got to the first campground she was out like a light, thank god. The next day was easier because we got to our camp ground before dark and emma got to run around for a few hours before bed. By the third day she was bored ( I was also) but we had camper issues so we didnt get to the Fort until 3 ish. Lucky it was a late night at magic kingdom, so emma got to go that first night!