Thanks for the replies. I figured I was ok, but would sure feel dumb if I lost the rig swinging a kid and hadn't asked here first.
We've been towing the kids on a tube lately, too. They really slow the boat down, but they are having fun and fun is what it's about. Before they get in the tube I always make them review the hand signals - thumbs up for faster, etc. They roll their eyes and say, "Yea, right Dad".