That's the challenge. If your comfortable shooting macro you only need a moment to Get the shot. I'm currently shooting 2:1 and for the most part I keep my lens set at this magnification, so each shot I'm at the same distance to subject.
To start with, I brought home some props along with the jumpers. I then release them one at a time, using one hand to coaxed them onto a leaf or piece of moss or whatever else I'm using. I then quickly take the shot. Some jumpers will settle down, others won't. This group of photos went fairly well, but I can spend up to several hours easily. You have to be at eye level and the jumper has to be looking at you to get the Best reflections in the eyes. You have to enjoy this as it can take a whole day, I usually take Saturday to collect the jumpers, pick out the props, take the photos them process them. Until recently I took 95% of my macros in the wild and took props along when I remembered. In the last month since getting my D600 I've been doing this more frequently. About 4 weeks ago in the middle of a heatwave with temperatures and heat index equaling 105 plus degrees I set up a little folding table to shot on and I'm still using it. If this jumper were frozen, gassed or dead there would be No challenge. You won't see any of my jumpers waving at you or balancing water drops on their heads. I let all the other guys do that, just to simple for me.