I'd be inclined to ask the dive operator their advice. I assume they'll want you planted, not neutrally buoyant, floating around with tasty limbs protruding out of the cage. In this case maybe just overweighted in a 7mm wetsuit.
Correct me if I'm wrong, but aren't these cage dives pretty close to the surface anyway? If so, maybe just leave a bit of surface air in the suit, which shouldn't squeeze much within 10ft or so.
Alternatively, if you're on surface supply maybe they'll have an extra long drysuit hose.
Correct me if I'm wrong, but aren't these cage dives pretty close to the surface anyway? If so, maybe just leave a bit of surface air in the suit, which shouldn't squeeze much within 10ft or so.
Alternatively, if you're on surface supply maybe they'll have an extra long drysuit hose.