While I am sure that the work crews are experienced, I would like to know that they are working with great caution. I have personally been on the fire line for wildfires in California that began from heavy equipment. Hot exhaust pipes, sparks from chains dragging on rocks and even metal Cat tracks have been known to be the cause of some of the worst wildfires here in the west.
It's not always a careless camper or arsonist. Sometimes it's just a guy at a jobsite.
Best of luck to the crews and do be careful.
Brian