Admit it. Sometimes you pack up all of your expensive ultralight backpacking gear and go car camping so you can practice using it and still have the option to drive to a motel in case it starts to rain. :-)
Seriously, trying out your ultralight gear or any backpacking gear in a more controlled car camping situation is just a good idea. I’ve heard way to many stories from AT thru-hikers and other SectionHiker readers about how they bought a ton of expensive gear and ended up hating it when they got on the trail, and were forced to use it without a net.
When I go car camping, it’s not uncommon for me to take a few stoves and shelters to practice setting up when I’m sitting around camp. If you’re driving you can bring as much gear as you want, from lawn chairs to bug houses, beer and take out. Throw in a bundle of wood from the supermarket and you can rough it in luxury.