I went for a pootle around the top of Scotland a few years ago, out of season (late September) and I was surprised how often the first (and in one case second) hotel I tried was booked up. I normally rely on the fact that I only need a single room and I'm not fussy lets me get away without advance booking.
In the bar one night, I was chatting to another biker and he asked if "I was doing the NC500?". Confused, I thought he meant the NC200 road races in NI, but wrong date, wrong place, wrong number. Once he explained, I had a look online and found "Scotland's answer to Route 66", which explained why the place was unseasonably busy.
Now it seems to have become a victim of its own success:
https://www.theguardian.com/travel/...h-coast-500-route-speeding-congestion-protest