For some reason the dragonflies seem to really like the antenna on my old beater car as a perch. Almost every time I go out the door there is one resting on the little ball tip of it. Some are a little skittish and others will let me get quite close. Unfortunately, it doesn't present the most appealing backdrop, but it does allow me to get some pictures of them pretty much whenever I want. That new 200-500 allows me a lot of distance from the critter, and it normally doesn't intrude into their personal space. The down side is it doesn't fill the frame that well, and I have to crop more than I might like to get a good filled frame.
BTW when I was growing up in Florida, we called them mosquito hawks. Seemed like an appropriate name to me.