Free: Contests & Raffles.
For me it really depends on where I am going, and more importantly how long I will be out there. If I am going for just a couple days I will almost always just carry camp on my back. If I am going to be out there for 4+ days I will always have a base camp, but may carry enough for one extra day always with me in case I get into elk far from camp, and want to stay right there.
Bivouac. Typically in reference to a bag that you sleep in without other tent or tarp.