The following is the solution to the River Crossing Puzzle:

(No fair Cheating)

1. move Cop and Prisoner across
2. move Cop back
3. move Cop and Boy 1 across
4. move Cop and Prisoner back
5. move Dad and Boy 2 across
6. move Dad back
7. move Mom and Dad across
8. move Mom back
9. move Cop and Prisoner across
10. move Dad back
11. move Mom and Dad across
12. move Mom back
13. move Mom and Girl 1 across
14. move Cop and Prisoner back
15. move Cop and Girl 2 across
16. move Cop back
17. move Cop and Prisoner across

If this is how you did it, YOU WON! (85)