Thank you all for your supportive comments on my last post. It really did make a difference and I didn't feel so alone. I will respond to all the comments individually but I thought I'd update everyone just now.
I managed to get onto the freight ferry. There was room for six cars. I had stood at the door of the office (which opens at 1am) since 0030 which was a good move because everyone else turned up not long after.
However the day had been far from smooth. There had been a serious crash on the A9 (which closed it for 5 hours) requiring a detour on the old A9. Unfortunately in places 2 HGVs (very big lorries) cannot easily pass in many places and the 15 mile detour took 3 hours. So when I arrived in Ullapool I'd been driving for nearly 8 hours.
I arrived in Ullapool and parked up at about 2200hrs.
The relief when I got the booking was colossal and I went back to the car and fell asleep until we boarded. Seeing the ship with only 6 cars' passengers was really weird. Of course there was no catering or anything else. I then slept until we arrived in Stornoway.
As we were about to leave the vessel one of the staff told us that Lewis had had a power failure during the night and they couldn't get the linkspan to work. So we were stuck on board for a further hour.
I always look for a positive in everything: at least by 0630 the supermarket was open for milk and bread.
I arrived home and slept. Woke mid-morning and emptied the car. Slept all afternoon. Shopped in the quiet of the evening so that I'd not have to shop on a busy Saturday morning.
Today has been catch-up day with folk and in the garden and polycarb which ran amok whilst I was away.
Now it's 9pm and when I've published this I'm going to sit in the living room and perhaps answer yesterday's comments and perhaps chill out for an hour if there is anything on the television.