Hi Maureen,
We have been up to the far north umpteen times. We usually do a three week tour and have made for Dunnet bay a couple of times , nice site, a little dated but excellent as you are 50 yds from the beach. Thurso and Wick we think are a little drab and disappointing, but a visit to the Heritage Museum in Wick is a must, it gives a real insight into the herring fishing. Our favourite spot is Altnaharra - the real back of beyond. It's a fab site with about 24 pitches, none of which are level, and of course no toilet or shower block, and private water supply which can sometimes appear a little gritty looking but is perfectly OK to drink.
As the site is on the edge of the loch, it's great for fishing if you are into that sort of thing. There are lots of places to take in while you are there, a trip along the North coast is a must. I wouldn't bother to go to John O Groats - it's only a shed and a couple of gift shops. Take a trip to Cape Wrath - fantastic.
We then usually go to the C&CC site at Inverewe gardens, You are just up the road from Gairloch, and you can then take in the Wester Ross coast route, up to Ullapool, again some spectacular scenery through Gruinard Bay, Aultbea etc.
There is of course the CC site at Kinlochewe, many people have described the site as a little tired, but we have always found it to be more than adequate. From there, or Gairloch, a visit to Applecross is essential, and definately stop off at the Applecross Hotel, they have the most extensive fish menu you are likely to come across. You will then return over the Cattle Pass - the highest in the UK.
We then usually go to Morvich, again a good stop off point for visiting Skye, Plockton etc, again try the Plockton Inn, they serve good fish dishes in there also.
This last year we had a few days on the new C&CC site at Glencoe and found it to be excellent, Bunree is OK but as LB says the dog walk is terrible, and because of that we choose not to use it.
Unfortunately, next year we will only be going for a fortnight, so will be extra choosy about where we stay!!
Hope this is of some use to you.
Wendy