RE: Where do you like to fly?
Well first off unless you have permission to fly on that construction site you are trespassing. Have an accident there and you could be in some trouble. Where I come from you ask for permission before you walk on property that doesn't belong to you or isn't public ,
That being said, I would rather fly with a few people around rather than by myself and do it on a club field. You always run the risk of injury and it's good to have someone there with you. As far as waiting to fly, or reckless fliers, you can run into that at any club and you patiently wait your turn and if a known reckless flier is out ,wait for them to land or you land and wait for them to finish.