>>803841i am in the same boat :-) i also get drunk as fuck and sleep in my car. the motto is, "get drunk enough to sleep in your car"
you will wake up at 5 in the morning though, its just a given. alternative, is buy a 3 person tent and just bring a back seat full of blankets for mucho confort. works like a charm and takes like 20 minutes to take down / set up.
PRO TIP, ITS VERY IMPORTANT::: start drinking AFTER the tent is set up.