One thing to bear in mind when driving particularly on Skye is that the road condition is absolutely dreadful once you get off the main roads. To get to any of the main tourist spots, e.g. Fairy Pools and Neist Point you will be driving on poorly maintained single track roads, that have been totally trashed by a summer of heavy traffic. The roads are basically a series of potholes linked by some random stretches of tarmac. Now as a local (who lives on the road to Neist Point), I know where the worst potholes are and can adjust my speed accordingly, but every single time I go out I encounter one or more rental cars stranded with flat tyres, caused by our potholes.
You will need to ensure that you have insurance that covers the tyres. This is often not included in standard car rental insurance. If you have the insurance and you have a problem you call the rental people who arrange recovery and repair. But on Skye there are only two garages who contact to the rental companies to do this work. You will likely be waiting at the side of road for several hours.
If you do not have this insurance you would need to call the only garage who deal directly with the public for tyres. They are called Ewan MacRae. I know from experience that they are extremely busy with their mobile tyre truck and people can wait as much as 4 hours from them to arrive. Only yesterday evening I rescued some visitors who'd hit a pothole and were stranded by the side of the road in the dark and rain. I brought them back to my house and called the garage for them. They didn't have insurance via their rental company and the cost of one tyre plus call out was £350.
This is a long winded way of saying that you might well regret not taking the insurance offered by the rental company.
