Having read this thread just after we'd booked a motorhome for a couple of weeks, I was actually quite hesitant about our trip to Scotland.
DH planned it - meticulously as always - not only what sites we would stay at overnight, but where the fuel stations were, where we would have breakfast and dinner and where we would stock up on supplies.
We had a fabulous trip, met some lovely people and saw what a beautiful part of the country Scotland is. We travelled miles on the single track parts of the NC500 without seeing another vehicle, when we did, we used passing points very competently and thoroughly enjoyed the trip.
We didn't use the toilet facilities 'on board', but the communal showers and toilets on the campsites, and others in cafe and supermarkets.
We avoided Skye on the basis of what we read here and on other sites but did travel from John O'Groats to Orkney (minus motorhome), and spent a wet, quiet Sunday on a tour of the islands. I didn't know it had so much history.
It certainly wasn't a cheap holiday. We spent an average of £150 a day in addition to the motorhome hire cost, but it was something different for us, we thoroughly enjoyed it, and at no time felt unwelcome.