Didn't catch the whole thread, but unless the one diver expects to dive with great frequency while others twirl their thumbs, I don't think this will be a problem. Example, there is a nice big reef behind the anchorage at Marina Cay toward Great Camano. Your diver could explore it...some could snorkel it..others could spend time liming on Pussers beach. It's a great spot to teach youngsters to snorkel at the old dock in front of Pussers..always fish. Shallow water...

Cooper Island offers similar opportunity... Of course the Indians ... Anyway I don't believe there is much cause to worry about a conflict.