Looks like fun!
Every year as a kid we went out to either Glamis or Buttercup. Also been to the Coral Pink dunes and Gordon's Well. I miss those days so much. One day I'll buy something I can take out there. My Jeep would overheat within 5 minutes.
I still have my 2005 Honda a Rancher, I took it out to the dunes a few times as a kid/young teen and it did ok-ish, but not enough power. Especially at my current weight compared to back then.
Here's me and my dad's cousin in September 1999. I was almost 5 years old.
The buggy was a Meyer's Manx that my dad put a 90's Ford Escort motor into with a turbo.
Next picture is me riding the Honda 70. It was a friend's, but I had one that was identical. I'd have to dig deeper into photos for it.