Car camping is not my thing, but here are pics of two metal pipe hammock stands with a custom-made tarp that might be used for hot tenting (sorry, should I have said "hot hanging"?).
The hammock stands are made from anondized metal pipe. Unfortunately, the guy who made them is no longer in business. The cover tarp is made by Squidbelly (on hammockforums.net).
I am just posting these pic's here in the thought that somebody might get some new ideas.