Maybe it will remind said 2 boats already at the launch that it is in fact a boat launch. A launch is not an area to get the boat prepared, tie on flies, untangle your 3 fly nymph rig, strap down boat, inflate/deflate pontoons, hook up anchor, put rods together, disassemble rods, put on waders, place oars in oar locks, load boat with the days essentials, etc...
I say the above a bit tongue in cheek as I know guys have to go and fetch their vehicle, but really way to much *hit goes down at the launch that should happen away from the launch in the parking lot.
Oh, and I love the dudes that give the pissed off glare that fish just above the launches as you float through their "run"