[StuartC]

It sounds like a cracking idea as you simply cannot beat local knowledge that is up to date.

The guide books are really useful, but may not reflect the current state of the wrecks as they deteriorate.

The logistics of getting to Scapa mean it's not likely to be something you can easily say without much regret, "oh well, we missed that bit of the dive, but we'll do it next time we come"

Admittedly, the size of the wrecks means there's plenty to keep you coming back for more, and there's always something to see that you didn't on the previous dive.

However, the likelihood of people being able to visit Scapa multiple times is limited for most people and guided diving is offered in most other top dive destinations to ensure divers get the full experience that either makes it the best experience or keeps them coming back.

Guided diving on the scale you're describing is clearly not going to be the "follow-the-leader and listen to their rattle" type, so I'd be interested if it were available and provided something of benefit to me.