I think you should take it easy and just stick a garden hose down one of the hole and dorwn them. Once the water is pouring out of each hole in the ground you should be good.
Once the area is muddy you can then cave the holes in by stepping on them.
But then to be sure, throw oil on top of the water that has flooded and light that shit on fire.
If you're like me you like to talk to things. I'm Gary Busey!!