Jamie: While I might not have been up to the challenge at Carnoustie, I agree that I wish I'd had the opportunity to play further back on a number of the courses we tried. During both my trips I was slightly above scratch, yet at the TOC I had to play a yardage of about 6,400. On my second trip I got fed up with this, especially while playing the short Eden course, and simply walked back to the "member" tees. I got a talking to from the Ranger a couple of times, but oh well.
That's one of the reasons I like Kingsbarns -- you can play the tees you like. It also made Murcar great fun -- as a paying guest, they were quite clear on allowing you to play whatever tees you wanted.
At St. Andrews and Carnoustie, I don't understand why they don't let you play further back if you keep the pace and show a card indicating you have the game. On a course where the ground is firm, 6,800 or 7,000 yards is not unreasonable.