Go to the local press now with your concerns over both the site and the council with a press release of your own. Even if nothing gets published now, if anything does happen, you will have a record of this when they try to scaremonger. You may find that with the support of the residents, right of way users, etc. you could have quite an effective voice though.
'Local Site Owner Objects To New Paintball Field on Safety Grounds'
How about that for a start, if an incident occured:
Shadlad Told 'Em So!