It moves fast. I burned the area twice. I sprayed stripes of water, about five feet wide, then burned from that strip towards my drive way, then moved back, set another wet stripe, then burned that. Basically I tried to set limits so it wouldn't run towards my neighbors property. The downside is, grass fires plus any wind can get sporty fast.
I also had irrigation Incase it got crazy. I would advise pre spraying down any plants you don't want to defoliage.
Lastly, I came back and burned everything again with a large torch cause I felt like the other method just took a bit off the top but wasn't as thorough as I wanted.