Two sites come to mind Clive.
Both are above Inverness and the first is the CC site at Dalchalm near Brora. A path from the site crosses the municipal golf links (where you can play) and leads on to a sandy beach which is miles long. Just watch out for the Arctic Terns who nest above the shoreline. You wont miss them because if you get too close you'll get dive bombed.
Brora is within cycling distance where they have a Co-op and pub etc.
Nice drives around where it's easy to spot thousands of red deer and the occasional eagle. Glen Loth and Strath Brora are two nice drives. From Brora you could always catch the train to Wick or Thurso. Just north is the small fishing port of Helmsdale where the local chippy does excellent grub. Ask for a fish and chip supper even if it is midday
We usually sit and eat them overlooking the harbour and some friends last year said they were watching a seal which had come into the harbour.
The second is a C&CC site on the Black Isle called Rosemarkie, again just the other side of Inverness. There is a pub which does meals within sight of the site. Again you are next to a long sandy beach and if you walk down to Chanonry Point, which is a spit of land that juts into the Moray Firth, you may spot the dolphins on an incoming tide. Inverness is a nice small city if the boss likes a bit of shopping.
I recommend both sites. We've been to Brora twice and wouldn't hesitate to go again if in the area or Rosemarkie come to that.
We usually use the CC site at Englethwaite Hall near Carlisle as a stopover which is only a few miles off the M6. Just further south we have used Low Park Wood, near Kendal, as a stopover which again is only a few miles off the M6.