see and do. snacks can create a huge hole in the budget.
if you are traveling with kids, explain to them the situation, then you can make a game out of it, as to who can save or come up with a cheaper way to do things. if the end prize on the trip is a exciting to go to, or do, then kids (especially older kids) will understand as long as you explain to them, that there is only so much money for this road trip, and if they spend it all on junk then there is not enough for the fun stuff.
a cheap road trip, can be a fun 