Tom Deckowski led a clubgwagen rally at Anza twice I think. It is a huge area but there is not much out there..... But yes for star gazing with a new moon, its quite spectacular if you stay in the northern or middle part. There are towns down in MEX that light comes into the bottom from.
We ran with that group and others did here too. We had to bail out early (only time I left a rally due to a mechanical issue) as my t-case was failing.....made it all the way back to LA though before imploding.
DV is equally splendid for star gazing.
Anza is actually the largest park in the continental USA.
Only beat by Wrangell St Elias National Park to your north.
But there is little out there.....I find so much more interesting stuff in DV in comparison.
Anyways, contact Tom he has routes to share I'd bet....
here are some photos from his routes, and you will see that most of the coolest routes can't be done with a trailer.....but maybe you guys can leave it in a camp and explore with just the car for a few hours here or there. Lot of rattle snakes out there, more than any other area I've been to....so beware of which bush you pee next to....but no reason not to go.https://redbulladdict.smugmug.com/Trave ... /i-XKNg3VN
and much better photos with his Jeep and FJ Cruiser outinghttps://redbulladdict.smugmug.com/Travel/FJC-in-Anza/