Lava soap was required for camping when I was in Boy Scouts (1980s). It was allegedly more environmentally friendly for washing at the campground spigots. Ivory bar soap was my parents soap of choice when I was growing up.
I haven't bought bar soap in... hmmm, not sure if I've ever bought bar soap since moving out on my own. Dawn dish soap and orange hand cleaners with pumice are what I've used for oil and grease as long as I can remember. In high school shop classes they used powdered soap, maybe Borax.