I have done the last 11 editions and did a couple of 'doubles' - so 13 in total. This was definitely the 'worst' conditions I've ridden in. It was wet and cold from the start - we did toe covers/booties over the shoes, knee warmers, bibs, base layer(First Ascent polyprop), cycling jersey, gilet, warmer fleece top/hydrophobic top, rain jacket, buff around neck and head, warm gloves. In retrospect could have done more for the feet and hands.
We started just before six and rode in the rain and against a slight head wind until 46km when I realised I had a front flat. By this point my tyre was almost on the rim, I simply did not notice through all the rain,mud and bumps and must have lost a lot of sealant by then - I also suspect that the sealant was not as efficient in these conditions as in the dry. As soon as we stopped we started to feel very cold - it was all good and well while cycling but as soon as you stopped the cold really got into your bones.
I had a cut on the tyre surface between the knobblies. It must have been glass or metal - bad luck. I plugged the cut and bombed it(the bomb froze to my hand and had to be pried off). We did a couple of km's and had to stop again for another bomb(this time it felt like the whole bomb contents did not go into the tyre - possibly due to the first bomb 'freezing' some sealant?).
I said to my partner that we must limp to the checkpoint and should be able to get some mechanical assistance or then try a tube. When we got there it was chaos, probably 150 riders standing around in space blankets and around the fires - they were not going to continue. People were standing inside the house as well.
The mechanic that was supposed to be there wasn't, they were helping getting people back to Willowmore. We got the tyre off and I inserted the tube. I don't know if the cold contracted the tyre a bit but we could not get it back on. I broke 2 tyre levers trying to get it on but no luck - it wasnt even close to getting back. We were four guys trying pulling and whatever but it would not budge.
I asked a couple of the riders with the same type of wheel if they would perhaps donate in order for us to continue but did not have any takers(don't blame anyone). By this point we were also shivering and I did not see any other option or plan but to withdraw.
Lots of people was in a very bad state - with most looking to have dressed properly.
This is just my observation. You were fine while moving but as soon as you stopped for too long the trouble started...
I'm still battling to get my head around the fact that I did not finish....