Too much structure? You sign up, get put in a group and wheel. How is that too much structure?
Waivers, paperwork, inspections, multiple locations, multiple mandatory show times, waiting in lines, etc. All based in/around a campsite with a kid it's more hassle than it's worth in my case. Just personal preference. If I'm doing a group thing like that it's a lot more fun if it's "when people feel like it" and it's not a big hurry. I get this is more of a "challenge" and that's cool, but my offroading style is more about getting outside and relaxing with some wheeling in between.
I'm going to wait till after Gone Moab to sign up but I'm a most likely. We were planning a repeat beach trip to NJ and this is on the way. Grew up wheeling at Rausch so it would be great to see how much it's changed in the last 16 years