In reply to rustyford:
You'll 'camp' on winter climbs in Scotland????
Have you ever been to Scotland in winter?
A. Its bloody cold. No one on here hangs around when winter climbing.
B. Errr, Its high up normally and not sheltered.
C. You may find the weather is changeable. Half way up some climb you think. "Oh, this i'll do for a bivvi spot" sort of thing. During the night the conditions could change so much you may find you cannot continue climbing in the morning due to absolute white out conditions, blizzards and so on. Or;-
D. It could thaw. What could be the crux pitch or indeed and easy one under good winter conditions may indeed turn out to be impossible to do if it rains and thaws overnight.
E. Nights in Scotland are long. Very long. From 4pm its dark early in the season. I assume you'll be eating? Having a brew? Taking some nosh perhaps? A sarni for the morning breakfast?
F. Bivvying on a Scottish Crag? You could find conditions change to :-
1. Avalanche prone during the night.
2. A dump of snow rendering the remaining pitches unsafe or unclimbable (see C above also)
Are you wanting the publicity when MR are called out to recover you by any chance?