When you e-mail them, let them know you want all the people on the list to recieve it.
All but one recieved mine and responded.
I e-mailed all of the parks people with my opinions on the CG range.
They all are trying to limit city liability and improve the range with larger (i.e. spec.20 ft.)berms.
They told me they had different opinions from other shooters on the risk of 50BMG's and tannerite.
I e-mailed them my 2 cents worth.
Be nice and we may get more out of this than we loose.