We just got back from a short weekend roadtrip. One of the things that we regularly do when we know we will be out of the house for a while is to plan ahead by packing some snacks and drinks. This saves lots of money when you're on the road. Convenience store snack and drink prices are outrageous! Multiply that times 5 people, and it adds up even more quickly. Plus, by packing your own, you can make sure there are plenty of healthy snack and drink choices available. Convenience store really don't have a whole lot of that available. On one stop at a gas station this weekend, one small apple was $1.09! Holy cow! I can get a whole pound of apples for that at the grocery store!
When traveling with children, inevetitably someone is going to start saying, "I'm hungry" or "I'm thirsty". With snacks already packed and with you in the vehicle, these problems are solved immediately, and we don't have to stop anywhere and pay outrageous prices for a small snack.
We usually take a cooler along, packed with drinks and snacks that need to be kept cooler. Some ideas of quick snacks to pack are granola bars, string cheese, fruit, crackers, etc. For drinks, we usually pack some bottled water, juice boxes, etc.
Packing our own snacks and drinks on outings saves both time and money, and it keeps people's needs easily met as we travel along.