Re: A little freaked about a big roadtrip with toddler. Advice please!
For those without DVD players, or looking for other options, we use children's books on CD/Ipod. There are great collections of kids books (curious george, etc.) available on CD (we found them at our local library), and sometimes they come with the book and it's a read along, and it tells the child when to turn the page to follow along. This isn't really applicable for the OP's 18 mo old, but older toddlers may be into it. DS was 2.5 when he started liking them.
SAHD to J 12.27.05, M 12.27.08, and A 2.15.11.