I have done this with 32 and open diff. I had to winch twice. This was over 10 years ago.
If you are locked and 33s With a winch and full skid you should be ok as long as you can get past the gate keeper. The beginning and end gate keeper was made very hard so people that don't belong there don't get stuck In there. I know they made the gate keeper harder since I gone through it, but there are lines you can take. Walk it, if you are not comfortable, turn around and hit gold mountain or John Bull.
It's an awesome trail that was closed for a while due to fires in the past.
I would not take more than 6 vehicle in the group or you will make t a very very very long day.