I'd be up for this. though I'd prefer to stay to the east (the west is wet, full of tourists and midges :-) )
a possible alternative is up the tomintoul road through the cairngorms, there's a decent campsite up at Granton. plenty of wild-camping just past Glenshee. there's also Glen Isla or Glen Clova, both of which have great pubs (Glen Clova being better).
another alternative would be a one-nighter down at Jedburgh. there's a caravan club campsite there that has a wee nook just off their main site. it would be ideal for ten or so tents/tipi's, and is out of the way of everyone else.
Beej is away for a 5 week euro-tour at the moment. so, you're in charge ! :-)