Cheers Hamish that's a gracious offer.
Crassy i know what you are saying there i have a canny sized collection of OS maps for England and Scotland and the tiny pockets of woodland shaded light green with a peach border (access rights) in England is pathetic whereas this is the standard shaded colour of woodland on Scottish OS maps. The guidelines in the Scottish Outdoor Code don't give any definite measure but it does state that you are not next to your car or visible from the road or paths, it also says in direct reference to wild camping that it is done in small numbers and only for two or three nights in any one place. You can camp in this way wherever access rights apply, but help to avoid causing problems for local people and land managers by not camping in enclosed fields of crops or farm animals and by keeping well away from buildings, roads or historic structures, personally i try to get about a mile away from the road (usually one of those small forest roads with passing places) but this is mostly so i don't hear any cars as they totter along it, bigger the road the further i want away from it