In reply to Matt does not bounce:
Morar to Oban Bothy is a great idea.
The Suilven trip is possibly one of the greatest UK canoe/mountain combos. Bit of a faff, but exceptional country to travel through & canoeing a lot easier than backpacking. Head along Loch Veyatie & through the shallows to Fionn Loch (possibly have to wade a little). You can then either return to the start or, for a traverse, head back through the shallows, then turn south into the bay of Loch Mhadail. From here its a km or so portage/drag/line down stream to Loch Sionascaig, one of the most beautiful places in Scotland. End by heading to Boat Bay & a quick portage out to the mad little road.
Beware that even moderate wind on the big lochs can make travel a. difficult, and b. potentially dangerous. Kayaks will handle this better, but you need to have good emergency procedures. Canoes will swamp in big waves, but are better at carrying the luxuries of life (liquid ones, mostly!). However, in good weather its a wonderful way to travel.
If you've a roof rack you can hire at the big newish Tiso's in Inverness.