After Hurricane Harvey struck southeast Texas last year, an Oklahoma church sent 150 people to help with disaster relief.

Before they left, church leaders worked to bolster safety on the nearly 1,000-mile round trip: They rented 18 newer-model vans and required volunteer drivers to complete an online training course.

This was in addition to making sure the vehicles, drivers, and passengers had insurance coverage.

"God forbid, if we had an accident with a van load full of people—you can run up some pretty high medical expenses," said John Trotter, elder and administrator for the Oklahoma church.

Managing the money of the church includes being up to date on insurance policies—knowing what types of coverage are essential, that policies include all possible drivers and vehicle scenarios, and that the limits are adequate.

Here are six questions to help church leaders when evaluating vehicle insurance coverage.