
Hi! We drive to WDW or Florida from NH most every year. We do it commando style and if we drive straight through we can make it to Orlando in less than 24 hours depending on traffic.... DH has driven coast to coast, and the The Ice Road as a truck driver many times so he is used to long rides and I am not afraid or to drive either. Our boys have been doing this since they were toddlers, so they are good about it too. AND it makes great childhood/family memories!!
We will bring a cooler with us to fit the food and keep things cool. a few frozen water bottles double as cooling and a cool drink 18 hours later. I think its a pretty well rounded menue. There is junk food on there but we all eat very healthy normally, so whats one day? We will do enough walking at WDW to make up for it!!

We will also stop at a grocery store before we head North for the ride home. Otherwise you can spend an extra $150-$200 to get home.
Here is what I have picked up for our trip (its generally the same every year - but varies a little). Feel free to IM me or ask any questions or advice - I am happy to help.
Cold fried chicken or chicken strips
Small snack size lunchables
cold pizza cut into small slices
lots of chips
string cheese
beef jerkey
Cookies
Gogurts
Apples
Random surprises - got some leftover valentines candies that I will pull out when the natives get restless
Small gatorades (covers are important), waters
Redbull & Starbucks (for Mom & Dad)
WetWipes
Dramamine & Excederine migrane (has caffine in it)
Papertowels and plastic grocery bags for trash
Fun little surprises ad new DVDs are fun to have ((as bribery)) and pull out when needed. It will keep them kids from getting too bored. My kids will have homework, so that will keep them pretty busy.