One link per crew. Share it wherever your crew already talks: group chat, email, the club newsletter, a QR code on a poster at the boathouse.

Good practice:

• Send it with context. “Here’s the link — sign up for Tuesday and Thursday this week” gets far better uptake than a bare URL.
• One crew, one link. If you run several crews, keep the links straight. A paddler on the wrong roster is a five-minute fix and a confusing first experience.
• Regenerate when it leaks. If a link ends up somewhere public, generate a fresh one. That kills the old link, so re-share it with anyone still joining.
• Don’t rely on it alone. Expect to add the two or three people who never click links.