They are planning to use Seal Hole cave at Snagnes?!
Someone has clearly not done sufficient background reading. I know a couple of people who have been in there and absolutely shat themselves as a result of the cave's namesake. Think of a bowl of maggots, swap the maggots with seals and turn the bowl into a cave....there.....in the dark as well.
There is an adit in the back of the cave and apart from a vintage PGC trip, which may have had a degree of success, the other trips resulted in people crapping themselves, slipping around on big writhing, slippery rocks in total panic and horror trying to get back to their boats! :lol: