From memory ten days.
Day 1. Left home (Canterbury) in the evening and wild camped in the early hours near the Scottish border.
Day 2. Drove up through Scotland to the West Coast and wild camped near Mallaig in Wester Ross.
Day 3. Followed the single track coast road round to Applecross. I think the road was part of the NC500. Camped in the Applecross campsite. We had a good evening meal in a nice cafe/restaurant in the walled garden of a large country house about a mile away. You can't really miss it.
Day 4. Up over the Applecross pass (not to be missed) and on to the Isle of Skye. Tip: drive up the east side of the island until you reach the hamlet of Brogaig then turn left towards Uig. This narrow road is often featured on motoring programs for a reason. It takes you on a wonderful drive up over the back bone of the island. Done it twice both times in October/November time. Utterly stunning drive.
The ferry from Uig to North Uist was full so spent the night at the campsite next to the harbour. Very cold, shower block wasn't heated and the light didn't work. Had a nice evening meal at the cafe on the harbour.
Day 5. Took morning ferry to North Uist. Took a slow drive down through North Uist, Benbecula, South Uist and Eriskay then after some sight seeing retraced our steps and spent the night in a Hotel on Benbecula. Because we couldn't get on the previous evenings ferry from Uig to North Uist we didn't think we had sufficient time to take the ferry to Barra.
Day 6. Drove through North Uist and took the ferry to Harris. A very interesting crossing with the ferry constantly weaving this way and that to avoid the rocks. Drove up the East coast of Harris on the single track road. Again utterly stunning and a very different landscape to the other islands so far. Purchased some obligatory Harris merch. Spent the night in the Harris Hotel. Nice meal. Wall to wall tartan everywhere.
Day 7. Drove on into Lewis. Did more sightseeing. Tried to visit the Black Houses but they had just shut for the season. Arrived at Stornoway early evening and tried to book a ferry to Mallaig on the main land. There wasn't one until the next day but we did manage to drive straight onto a nearlly empty HGV RORO ferry that was just leaving. Smelt of rotting fish on the vehicle deck. Only about 3 or 4 other drivers on board. The steward cooked us a great meal then I slept all the way across.. Arrived in Mallaig around midnight and drove on eventually stopping to wild camp somewhere in the Cairngorms.
Day 8. Drove down through Edinborough, the Borders etc and stopped at the Caravan and Motorhome site in York. Snotty warden who left notes on the windscreen demanding we parked the other way round. Ignored him.
Day 9. Also in York. Guzzled tea and cake in Bettys
Day 10. Drove back home to Canterbury.