In regards to no lakes in 29 there is one.
https://www.29palms.marines.mil/Articles/Article/499151/unraveling-the-inner-workings-of-lake-bandini/
This Anon is Marine, was stationed there.
Other then being the punchline of a lot of jokes, its also the source of a lot of rumors and tall tales. Some of it turn out to be true.
"Accidents" happen all the damn time in and around 29. Some of it Mil, some of it Civ. Im digging up articles now, but I know there corpses have been thrown in that Lake. Just so you get a taste of the amount of murders and shit, this is fresh sauce
https://www.marinecorpstimes.com/news/your-marine-corps/2019/01/29/an-inside-look-into-the-strange-case-possible-love-triangle-of-a-marine-lieutenant-charged-with-murder-of-man-found-in-joshua-tree-national-park/