why would divers of different configs be a problem, we might all go in at the same time but we dont need to come up at the same time, singles can go to the surface when they want to and long stay types can stay with us. One of the benefits of the wrecks up here is the huge relief , go to the top of the wreck and bag off when it suits.
Overhead environment stuff is okay as well as long as all are happy, the bits I go thru with groups are adventurous but safe and if an individual is not happy then they are briefed to stay put while we return, about 3 minutes. Please remember folks we are not teaching people to dive on these dives, we are showing them the interesting bits, they can come and go as they please.
Brains can be left on
it is an option
JTI