having just lost our field last Oct, perhaps you should be glad to have a farmer that is willing to let you fly at all! If he says no gas, then its no gas. Now that does not mean that you cant try to educate him on the safety of gas engines. And perhaps the AMA may have some help in this area. Just telling the farmer that gas really is safe won't do much, but if you have data from a great source to back up the request, it may help. Good luck and keep us in the loop about how it turns out.