I visited a native summer fishing camp on the Churchill River. Wind-blown, barren spit of rock and sand. No bugs at all. Absolutely neat and tidy. The midden must have been back in the forest. They were there when I arrived in late May, they were there in late August when I left. Winter survivorship in that location would have been zero. There were clusters of log cabins no more than 5 miles down river. Very swampy ground in summer but good forest shelter for the winter. I think they went downstream for the wild rice harvest in the autumn. On the Pacific Northwest coast, rising sea levels have flooded all but the most recent few centuries of native activity. I'm told that the coast line was some 200' below the present, during the last ice age. So low that walking from the mainland to Haida Gwaii was probable. Museum people have told me of several substantial coastal middens but it's the same old issue: time and money, to see those examined. Even now, slowly rising sea levels make some paleo-nordic sites on the east coast accessible only at low tide. The Haida lived in large villages in log-framed long houses. The anthropologist, Franz Boas, recorded that the largest split cedar plank in a house wall was 14' tall, 36" wide and 3/4" thick. Split. With the big cedar canoes, Haida took their house boards from one camp to another. I've seen pictures of some paleo village houses in the UK, constructed from stone. With moss chinked into the cracks and partly(?) below ground, those must have been cozy.