I was at a shoot yrs. ago, where they had a 50yd shot at a 3d deer--Thing was it was surrounded by burlap bags stuffed full of STINK"N, STINK'N ROTTEN CARP-- Lot of laughs. It was so bad a few guys just left their errant arrow buried in the reeking slime.
Ariels using helium filled ballons (you can rent a tank of He.) Flu'flu's, of course. Trick is to release them so that out front of archers, so that they move away from them to simulate rising pheasant, and going away shot. Distance of archers from the orgin of release is dependant on strength of wind. You need to exp. w a few to determine archers station to create the most interesting shot, given the current conditions-- Only takes one or two trials to get it right. Its alot fun--3D ariels.