That might work. The ATV thing, with a long enough rope/cable could easily work, as long as the ATV starts behind the shooter and pulls away from the shooter further, as it drags the target closer.
But I like the remote control. FIgure out how to not hit the car... should be a good thought of a way to do it.
I'd also think a lightly inclined zip line and something hanging on ball bearing type rollers or such coming at you could be an OK deal too.
