Take pictures of the field. It will show how dangerous it is. Meaning military people can get hurt on it.
Find out who makes the "Off limits list".
Once that is done they will contact the owner and let him know that his place is off limits to Military. This will do two things, make him not care or fix it up,cause it's profits that he is loosing.
Becareful playing out law ball over seas. I remember in Germany, we could only play on Military bases.
You could contact companies that will be willing to help out MWR with guns and gear. Grants are the big thing with MWR.
Money is tight with the Gov branches of service. You have alot of leg work ahead of you.