wilderness has "always" had cabins and habitations ...or you built your own,,cut down some trees and built a cabin...READ Jack London
Indian camps,,,,, never in the history of the USA and not for thousands of years before the USA has thier ever been pristine wilderness...why you can find artifacts of these past inhabitants...a lot of the time it is thier garbage that we find..pottery shards and other broken discarded items they just threw all thier garbage in a heap ...moving from cabin to cabin is a time honored way of "wilderness"travel ...
lumber camps ..trapping camps..herders camps..hunting camps lodges...read Horace Kephart..
shelters are here to stay.....they always been there and always will anything else is artifically unnatural...aberrant behavior