No matter what kind of camping you are doing, a groundsheet is always a good idea. It provides an extra layer of protection against the elements and can help keep your sleeping area clean and dry.
If you are car camping, you might not need a groundsheet because your car will provide some protection from the ground. However, if you are tent camping, a groundsheet is essential. It will protect your tent from wear and tear and keep the bottom of your tent clean.
A groundsheet also helps to insulate your sleeping area from the cold ground. If you are planning on doing any winter camping, a groundsheet is a must-have item. It can make all the difference in whether or not you have a comfortable night's sleep.
In general, a groundsheet is always a good idea when camping. It offers protection for your gear and keeps you more comfortable while sleeping. If you are unsure about whether or not you need one, err on the side of caution and bring one along with you on your next camping trip.