I spent one night in my tent at Mortonhall Camping Park during my Scotland-Trip last June.
It's a nice place and the staff is really friendly and helpful! The sanitary facilities are exceptionally clean. There's also a small shop and a pub. The location is good, about 15 minutes to Edinburgh by bus (the bus stop is right at the entrance). Not cheap for a campsite but I would definately recommend it!
- Free Wifi