If you're not on a beach with a restroom, you have two choices: convince the kid to do his business in the ocean, or pack everything back up and head to the car to go find a place to go.
In case you missed it, Oregon has allowed self-serve gas stations in their state, so New Jersey is now out on an island - we are the only state where there is no self-serve gas.
If this is you son or daughter's first taste of organized spots, this is for you. Being a baseball mom or dad is quite a responsibility and shouldn't be taken lightly.