I posted this question a few days permature. The land we are using is owned by a timber company, and the origional report the members received was no gas engines because of the fire danger. So here I set with 4 gas engines and can't use them at this field.
After I brought this matter up at our last club meeting, I found out after posting , that we can use gas engines on aircraft, if you have a fire extinguisher (common sense), a shovel and an ax with you when at the field, this applies at all times, electrics, fuel or gas . The information we just received was that the landowner meant no gas operated chain saws because of the fire danger, sparks from the chain etc. The flying of jets is prohibited at all times.
I thank you for your input on my question, and apologize for posting before I had accurate information.
Regards and have fun flying!