We normally do not consume much candy in our house. I've been known to have to throw out halloween candy from the previous year just before it's time to go trick-or-treating again.
It's not that my kids don't like candy or that they have this superhuman will power, it's just that we eat during specified meal times and usually they ask for a cookie or something like that after dinner. So that means that candy is pretty special. And I totally use that to my advantage when we travel!
On the epic walk from the Natural History Musuem in Washington, D.C. to the Lincoln Memorial, I had to start bribing them about halfway there with Jolly Ranchers. And when we were faced with 5 looooooonnnnnng (according to the kiddos) hours in the car going from my grandmother's house in Georgia back to our vacation house in South Carolina, Will came through with this crazy gum he found in the gas station that dyes your tongue blue.
I had the forethought on our last big trip to pack some of the easter candy in my camera bag so when the whining started while we were waiting for fireworks on July 4th, I pulled out Blo Pops and suddenly I was everyone's best friend!
The trick is keeping Will out of it until the right moment when the candy is most needed. ;)