I am considering some types of mulch for my orchard but I am really worried about fire. We have about three month(summer) without any rainfall and humidity is about 20-30%. For example if I use hay or straw It would be like gasoline under trees that can ignite from a single cigarette. What kind of mulch should I use if I want to be safe from fire and also snakes. And how much should I be worried about these things?