I would absolutely take the chance with the rookies/young goalies in the playoffs.
Just go back and look at Skinner's PO record: he has been removed as starter, repeatedly, after blowing PO games. I know he has been pretty good this season since the trade, but I'd have to go with the kids without the choke history.
I've watched more Oiler PO games than any other, and this guy was always the worst goalie on the ice. Every game. You might steal a game or two like that, but it’s really hard to win a series against top teams when your guy gives up a couple softies each game. It's heartbreaking.