Propane allows you to camp just about anywhere as you don’t need a connection to electricity to make quite a few of your RV systems work like cooking, running heat and how water and powering the refrigerator and other appliances. However, if you’re camping with full hookups, use propane sparingly.
Many motorhomes have the propane tanks mounted to the rig. Travel trailers and 5th wheels use portable tanks like you use at home with your BBQ grill. Some campgrounds will pick up your portable tanks, fill them and bring them back. That’s great service!