cheers folks the more info the better wild camping sounds great and bunkhouses sound good if the weather is poor
I know you asked about campsites but a lot of Scotland has really great bunkhouses. If your heading out to some of the islands a lot of them are old, thatched crofting cottages, situated right on the beach and are generally pretty deserted.
+ 1 for the wild camping.
If you want a brake from the 'joys' of camping check out Wigwam holidays. Not so much glamping more respite from a long wet Scottish camping trip! My cousin owns and runs this company, so I do have an interest!! UK Glamping Holidays in Cornwall, Wales, Yorkshire & Scotland