for those wishing to pursue this topic to its (il)logocal conclusion I would suggest the following background reading;
1) Stephen Fry, "The Liar" ;- "two sheets; one to wipe, one to polish"
2) Ranulph Fiennes "Mind Over Matter" and Mike Stroud "Shadows in the Wasteland" ;- two accounts of the same trans-Antarctic expedition, where the whole subject of tents, plastic bags, frost-bite and their attendant ramifications are treated in far more detail than anyone could possibly wish to know
a propos rough/smooth, if there was ever an incentive to do well at 11-Plus, that may well have been it....
''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.