My club flies on a former landfill in my town. Diagonally across the street, about 1,000 feet away there is a heliport. When we started the club about a year ago, I informed them of our presence. I was concerned because a number of years ago someone else tried to fly on a piece of land more directly across from them. At first we agreed that when we were flying we would call them up so they would not approach over us. This has worked out very well for us so far. No matter, we either land or fly very low whenever a heli is in sight. We show them as much courtesy as possible and so far so good. Now when they go up they look to see if there are any cars at the field and avoid us all together. So it is possible to safely coexist.