Right, Highland Cottage. It's in Otter Ferry, which is on Loch Fyne. A single track road runs through it. That's it. It's very quiet.
The cottage itself is one of three around a little courtyard. They used to be farm buildings. It's solid, stone-built. You get three bedrooms and two bathrooms. Sleeps six. I'd say it's comfortable, not basic. They've given it a 4 Star rating, which seems fair.
You're looking out over trees and the river. The place is part of an estate, so you've got miles of private woodland to walk in straight from the door. They've got fishing rights on the river, salmon and trout, if that's your thing. There's a hut by the riverbank.
For the beach, you'd drive about five miles. The famous view here is the Kyles of Bute, which is about six miles away. Tighnabruaich village is about the same distance. It's got a small shop, places to eat, and a nine-hole golf course.
There is a pub that does food in Colintraive, about nine miles. The nearest proper shop is a bit of a drive, about thirteen miles, so you'll want to come prepared.
What's here: It's got parking. There's a woodburning stove, WiFi, a washing machine. Bedding and towels are included. One well-behaved dog is allowed. There's a cot and a highchair if you need them.
If you're planning to explore, these sites are useful: National Trust for Scotland Argyll and Loch Lomond & The Trossachs National Park.