Can strongly recommend the north west coast to you. With 7 days you could really get to grips with Everything from The bridge of orchy, up to Glencoe, Fort William, Roy Bridge and them up towards:
Down to Mull if you fancy it
Kyle of Lochalsh - over to the Isle of Skye - can really recommend the North West corner - Dunvegan - The drive/ride out there is stunning and a good campsite.
down the south of Skye to Glenbrittle... outstanding place.
Heading back to the main land - Head North to Loch Torridan... and follow back down either the West coast or over to Inverness and back down the great glen, loch lomand etc...
They say the midges are really bad but I was camping up there in July last year with no real problems.... Skye is great if you want to spend loads of time there, B&B's get full so booking is better but we turned up at 10pm on a saturday night and a couple put us up just out of dunvegan - he used to own a bike shop in Pontefract, West Yorkshire.
I could witter on for ages about the places up there but won't... Enjoy...
I'll try anything once, twice if it didn't kill me!