For those guys, who did not make it to Havoc, the conditions didn't warrant 4h. With that said, I did run in 2wd, 4h and even 4l. I really tried to push it in 2wd without the rear locked but most of the time I had the rear locked when in the dirt.
I had hoped for more sand which would require 4wd. As it was, most areas were hard packed. I don't think anyone got stuck. There were some very steep spots, off camber, technical stuff which is why I had to go to low. On day 2, some of us took a wrong turn which lead us to tight, rocky, "jeep trail". This section was high up on a peak with trees, rocks, it was very tight.
I guess what I'm trying to say is, there was a varity of terrain, it was a good mix. I don't think you can say: when off-road you should always be in 4h", or "2wd with the lockers on". With experience, you will get a feel for what combination works best in what conditions. I know this was a big topic with all who attended.