My H has bought a boat as he thinks this will be a healthy tool for us to reconnect.
I can understand thinking that such recreational activity can be beneficial for the relationship, but I don't think that's basically true. Relationships are made healthier through communication and meeting emotional needs, not by boating, fishing or cruising. You could do those activities, of course, as they can enhance a relationship, but I don't think they can repair it.
The two people that go on that boat will carry with them the same issues, problems and patterns they have on land.
Why does anyone want to reconcile with a S when he has lied, cheated and bought gifts for their lover? What constitutes a good S?
If you think that people make grave mistakes in judgment and actions, then lying and deceit is right up there. But then he regretted his actions and showed remorse, right? So the question becomes, can you have the relationship you want with this man? Do you really love him, or simply "need" him?