Derek DeFelice and wife Aaron are co-owners of Hero’s on Wheels, a food truck that can be found near the North Street Recreation Area in Waterville.

Terrylynn Wentworth carries meals made for her and husband Richard Wentworth on Wednesday at Hero’s on Wheels near the North Street Recreation Area in Waterville. The Wentworths ordered a steak and cheese sub, chicken fingers and fries.

Derek DeFelice and wife Aaron, co-owners of Hero’s on Wheels, prepare food for customers Wednesday near the North Street Recreation Area in Waterville. Hero's is one of nearly 670 mobile food operations in Maine licensed by the state.

Derek DeFelice, co-owner of Hero’s on Wheels, prepares a steak and cheese sub with fries Wednesday near the North Street Recreation Area in Waterville.

Derek DeFelice and wife Aaron, co-owners of Hero’s on Wheels, take customer orders Wednesday near the North Street Recreation Area in Waterville.

Derek DeFelice, co-owner of Hero’s on Wheels, takes an order Wednesday near the North Street Recreation Area in Waterville.