From my understanding, it will be a little different than years past. They used to cram as much stuff in two days to try and cover as much as possible so candidates would have an idea what to expect. Yes, no day at OCS will be that crazy or hectic than the pre-OCS weekend. But.....I wouldn't take that too lightly. I think this year, they are not gonna cram as much stuff into the weekend and just focus on the basic stuff that will help you all through OCS. The rest they figure, you just have to experience.
But they will have real Sergeant Instructors, so comes all the yelling and games. As far as running, I would assume you will do some but probably more humpin' with the pack. It should be fun and challenging. Capt and GySgt will have a good weekend set up for you candidates.